[i18n] Add en-GB and Romanian translation to UI (#11577)

* Add en_GB translation to UI

Follow-up to https://github.com/koreader/koreader-translations/pull/167

* Uncomment Romanian

frontend/ui/language.lua

@@ -6,6 +6,7 @@ local Language = {
     language_names = {
         C = "English",
         en = "English",
+        en_GB = "English (United Kingdom)",
         ca = "Catalá",
         cs = "Čeština",
         da = "Dansk",
@@ -118,6 +119,7 @@ function Language:getLangMenuTable()
             -- NOTE: language with no translation are commented out for now
             sub_item_table = {
                 self:genLanguageSubItem("C"),
+                self:genLanguageSubItem("en_GB"),
                 self:genLanguageSubItem("ca"),
                 self:genLanguageSubItem("cs"),
                 self:genLanguageSubItem("de"),
@@ -138,7 +140,7 @@ function Language:getLangMenuTable()
                 --self:genLanguageSubItem("pl_PL"),
                 self:genLanguageSubItem("pt_PT"),
                 self:genLanguageSubItem("pt_BR"),
-                --self:genLanguageSubItem("ro"),
+                self:genLanguageSubItem("ro"),
                 self:genLanguageSubItem("ro_MD"),
                 self:genLanguageSubItem("sk"),
                 self:genLanguageSubItem("sv"),