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-rw-r--r--program/lib/Roundcube/rcube.php6
1 files changed, 5 insertions, 1 deletions
diff --git a/program/lib/Roundcube/rcube.php b/program/lib/Roundcube/rcube.php
index d9c3dd8b9..e43f53526 100644
--- a/program/lib/Roundcube/rcube.php
+++ b/program/lib/Roundcube/rcube.php
@@ -702,7 +702,11 @@ class rcube
// user HTTP_ACCEPT_LANGUAGE if no language is specified
if (empty($lang) || $lang == 'auto') {
$accept_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
- $lang = str_replace('-', '_', $accept_langs[0]);
+ $lang = $accept_langs[0];
+
+ if (preg_match('/^([a-z]+)[_-]([a-z]+)$/i', $lang, $m)) {
+ $lang = $m[1] . '_' . strtoupper($m[2]);
+ }
}
if (empty($rcube_languages)) {