diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 361b1c8..3bc994a 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -1254,7 +1254,7 @@
 
             if (f->type == NGX_HTTP_FASTCGI_STDOUT && f->length == 0) {
                 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                              "upstream closed prematurely FastCGI stdout");
+                              "upstream prematurely closed FastCGI stdout");
 
                 return NGX_HTTP_UPSTREAM_INVALID_HEADER;
             }
@@ -2198,8 +2198,8 @@
 
     if (conf->upstream.busy_buffers_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-             "\"fastcgi_busy_buffers_size\" must be equal or bigger than "
-             "maximum of the value of \"fastcgi_buffer_size\" and "
+             "\"fastcgi_busy_buffers_size\" must be equal to or greater than "
+             "the maximum of the value of \"fastcgi_buffer_size\" and "
              "one of the \"fastcgi_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -2229,8 +2229,8 @@
 
     if (conf->upstream.temp_file_write_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-             "\"fastcgi_temp_file_write_size\" must be equal or bigger than "
-             "maximum of the value of \"fastcgi_buffer_size\" and "
+             "\"fastcgi_temp_file_write_size\" must be equal to or greater "
+             "than the maximum of the value of \"fastcgi_buffer_size\" and "
              "one of the \"fastcgi_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -2253,8 +2253,8 @@
     {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
              "\"fastcgi_max_temp_file_size\" must be equal to zero to disable "
-             "the temporary files usage or must be equal or bigger than "
-             "maximum of the value of \"fastcgi_buffer_size\" and "
+             "temporary files usage or must be equal to or greater than "
+             "the maximum of the value of \"fastcgi_buffer_size\" and "
              "one of the \"fastcgi_buffers\"");
 
         return NGX_CONF_ERROR;
diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
index 1d7599e..30b0e35 100644
--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -566,7 +566,7 @@
 
     if (ctx->binary_include) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "binary geo range base \"%s\" may not be mixed with usual entries",
+            "binary geo range base \"%s\" cannot be mixed with usual entries",
             ctx->include_name.data);
         return NGX_CONF_ERROR;
     }
@@ -1195,7 +1195,7 @@
 
     if (ctx->outside_entries) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "binary geo range base \"%s\" may not be mixed with usual entries",
+            "binary geo range base \"%s\" cannot be mixed with usual entries",
             name->data);
         rc = NGX_ERROR;
         goto done;
@@ -1203,7 +1203,7 @@
 
     if (ctx->binary_include) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "second binary geo range base \"%s\" may not be mixed with \"%s\"",
+            "second binary geo range base \"%s\" cannot be mixed with \"%s\"",
             name->data, ctx->include_name.data);
         rc = NGX_ERROR;
         goto done;
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 1a99e17..d8bcad0 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -2734,8 +2734,8 @@
 
     if (conf->upstream.busy_buffers_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-             "\"proxy_busy_buffers_size\" must be equal or bigger than "
-             "maximum of the value of \"proxy_buffer_size\" and "
+             "\"proxy_busy_buffers_size\" must be equal to or greater than "
+             "the maximum of the value of \"proxy_buffer_size\" and "
              "one of the \"proxy_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -2765,8 +2765,8 @@
 
     if (conf->upstream.temp_file_write_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-             "\"proxy_temp_file_write_size\" must be equal or bigger than "
-             "maximum of the value of \"proxy_buffer_size\" and "
+             "\"proxy_temp_file_write_size\" must be equal to or greater "
+             "than the maximum of the value of \"proxy_buffer_size\" and "
              "one of the \"proxy_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -2788,8 +2788,8 @@
     {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
              "\"proxy_max_temp_file_size\" must be equal to zero to disable "
-             "the temporary files usage or must be equal or bigger than "
-             "maximum of the value of \"proxy_buffer_size\" and "
+             "temporary files usage or must be equal to or greater than "
+             "the maximum of the value of \"proxy_buffer_size\" and "
              "one of the \"proxy_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -3425,11 +3425,11 @@
     {
         if (plcf->vars.uri.len) {
             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                               "\"proxy_pass\" may not have URI part in "
+                               "\"proxy_pass\" cannot have URI part in "
                                "location given by regular expression, "
                                "or inside named location, "
-                               "or inside the \"if\" statement, "
-                               "or inside the \"limit_except\" block");
+                               "or inside \"if\" statement, "
+                               "or inside \"limit_except\" block");
             return NGX_CONF_ERROR;
         }
 
@@ -3498,14 +3498,14 @@
     if (ngx_strcmp(value[1].data, "default") == 0) {
         if (plcf->proxy_lengths) {
             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                               "\"proxy_redirect default\" may not be used "
+                               "\"proxy_redirect default\" cannot be used "
                                "with \"proxy_pass\" directive with variables");
             return NGX_CONF_ERROR;
         }
 
         if (plcf->url.data == NULL) {
             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                               "\"proxy_redirect default\" must go "
+                               "\"proxy_redirect default\" should be placed "
                                "after the \"proxy_pass\" directive");
             return NGX_CONF_ERROR;
         }
diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
index a6c8cad..239da6b 100644
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c
@@ -1173,8 +1173,8 @@
 
     if (conf->upstream.busy_buffers_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "\"scgi_busy_buffers_size\" must be equal or bigger "
-            "than maximum of the value of \"scgi_buffer_size\" and "
+            "\"scgi_busy_buffers_size\" must be equal to or greater "
+            "than the maximum of the value of \"scgi_buffer_size\" and "
             "one of the \"scgi_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -1204,8 +1204,8 @@
 
     if (conf->upstream.temp_file_write_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "\"scgi_temp_file_write_size\" must be equal or bigger than "
-            "maximum of the value of \"scgi_buffer_size\" and "
+            "\"scgi_temp_file_write_size\" must be equal to or greater than "
+            "the maximum of the value of \"scgi_buffer_size\" and "
             "one of the \"scgi_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -1227,8 +1227,8 @@
         && conf->upstream.max_temp_file_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
             "\"scgi_max_temp_file_size\" must be equal to zero to disable "
-            "the temporary files usage or must be equal or bigger than "
-            "maximum of the value of \"scgi_buffer_size\" and "
+            "temporary files usage or must be equal to or greater than "
+            "the maximum of the value of \"scgi_buffer_size\" and "
             "one of the \"scgi_buffers\"");
 
         return NGX_CONF_ERROR;
diff --git a/src/http/modules/ngx_http_split_clients_module.c b/src/http/modules/ngx_http_split_clients_module.c
index 6b1a815..726269c 100644
--- a/src/http/modules/ngx_http_split_clients_module.c
+++ b/src/http/modules/ngx_http_split_clients_module.c
@@ -177,7 +177,7 @@
         sum = part[i].percent ? sum + part[i].percent : 10000;
         if (sum > 10000) {
             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                               "percent sum is more than 100%%");
+                               "percent total is greater than 100%%");
             return NGX_CONF_ERROR;
         }
 
diff --git a/src/http/modules/ngx_http_ssi_filter_module.c b/src/http/modules/ngx_http_ssi_filter_module.c
index f47cb42..219465a 100644
--- a/src/http/modules/ngx_http_ssi_filter_module.c
+++ b/src/http/modules/ngx_http_ssi_filter_module.c
@@ -2003,7 +2003,7 @@
 
     if (set && stub) {
         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                      "\"set\" and \"stub\" may not be used together "
+                      "\"set\" and \"stub\" cannot be used together "
                       "in \"include\" SSI command");
         return NGX_HTTP_SSI_ERROR;
     }
@@ -2011,7 +2011,7 @@
     if (wait) {
         if (uri == NULL) {
             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                          "\"wait\" may not be used with file=\"%V\"", file);
+                          "\"wait\" cannot be used with file=\"%V\"", file);
             return NGX_HTTP_SSI_ERROR;
         }
 
@@ -2188,7 +2188,7 @@
 
     } else {
         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                      "only one subrequest may be waited at the same time");
+                      "can only wait for one subrequest at a time");
     }
 
     return NGX_OK;
diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
index 54172ba..0c999ca 100644
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c
@@ -1216,8 +1216,8 @@
 
     if (conf->upstream.busy_buffers_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "\"uwsgi_busy_buffers_size\" must be equal or bigger "
-            "than maximum of the value of \"uwsgi_buffer_size\" and "
+            "\"uwsgi_busy_buffers_size\" must be equal to or greater "
+            "than the maximum of the value of \"uwsgi_buffer_size\" and "
             "one of the \"uwsgi_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -1247,8 +1247,8 @@
 
     if (conf->upstream.temp_file_write_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "\"uwsgi_temp_file_write_size\" must be equal or bigger than "
-            "maximum of the value of \"uwsgi_buffer_size\" and "
+            "\"uwsgi_temp_file_write_size\" must be equal to or greater than "
+            "the maximum of the value of \"uwsgi_buffer_size\" and "
             "one of the \"uwsgi_buffers\"");
 
         return NGX_CONF_ERROR;
@@ -1270,8 +1270,8 @@
         && conf->upstream.max_temp_file_size < size) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
             "\"uwsgi_max_temp_file_size\" must be equal to zero to disable "
-            "the temporary files usage or must be equal or bigger than "
-            "maximum of the value of \"uwsgi_buffer_size\" and "
+            "temporary files usage or must be equal to or greater than "
+            "the maximum of the value of \"uwsgi_buffer_size\" and "
             "one of the \"uwsgi_buffers\"");
 
         return NGX_CONF_ERROR;
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 441517e..75ed23a 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1175,7 +1175,7 @@
 
     if (n == 0) {
         ngx_log_error(NGX_LOG_INFO, c->log, 0,
-                      "client closed prematurely connection");
+                      "client prematurely closed connection");
     }
 
     if (n == 0 || n == NGX_ERROR) {
@@ -2426,7 +2426,7 @@
     }
 
     ngx_log_error(NGX_LOG_INFO, c->log, err,
-                  "client closed prematurely connection");
+                  "client prematurely closed connection");
 
     ngx_http_finalize_request(r, 0);
 }
diff --git a/src/http/ngx_http_request_body.c b/src/http/ngx_http_request_body.c
index ac09d56..bddd7c5 100644
--- a/src/http/ngx_http_request_body.c
+++ b/src/http/ngx_http_request_body.c
@@ -303,7 +303,7 @@
 
             if (n == 0) {
                 ngx_log_error(NGX_LOG_INFO, c->log, 0,
-                              "client closed prematurely connection");
+                              "client prematurely closed connection");
             }
 
             if (n == 0 || n == NGX_ERROR) {