On unrecognized LC_MESSAGES (e.g. C.utf8) the .empty() check
fails and loads empty translations leading to constant:
[ 1536ms] [I18n.cpp:34 WARNING] Untranslated: 'Gameplay paused'
--- a/src/Os.cpp
+++ b/src/Os.cpp
@@ -279,3 +279,3 @@
         auto fn = thp::format("i18n/%s", lang);
-        if (!Config::readFile(fn).empty()) {
+        if (!access(Config::findFile(fn).c_str(),F_OK)) {
             Tr::load(fn);