> Some of the translation strings were missing from the fallback translation dict. Fixes #17.

[LittleCyberCortex]

          > Some of the translation strings were missing from the fallback translation dict. Fixes #17.

Wrong, it doesn't fix #17, because the extension deletes all hardcoded tables upon closing, so re-opening the window fails due to an ipairs(nil) call.
Overly aggressive cleanup or missing reactivation logic

-- Function triggered when the extension is activated
function activate()
	vlc.msg.dbg(_VERSION) --display Lua version in the VLC message window
	vlc.msg.dbg("[Lyrics Finder] Activating ")
	langcode = getenv_lang() --auto guess
	if dlg then
		dlg:show()
	end
	
	show_dialog()
	return true
end

function close()
	deactivate()
end

-- Function triggered when the extension is deactivated
function deactivate()
	reset_variables()
	vlc.deactivate()
	vlc.msg.dbg("[Lyrics Finder] Deactivated")
	return true
end

Specifically the method "reset_variables()":

-- Resets dialog
function reset_variables()
	dlg = nil
	title = nil
	artist = nil
	lyric = nil
	source_label = nil
	languages = nil
	translation = nil
end

The "languages" and "translation" KV tables are defined at the beginning of the lua file and get emptied in memory upon unloading the window.

Originally posted by @LittleCyberCortex in #19 (comment)