I have installed WP-Lang. Everything is fine with text but

I have installed WP-Lang. Everything is fine with text but I have a logo that is being set in the theme options Logo: /wp-content/themes/files/images/logo.png

This logo has an english text, So I need to have different version for each language. What’s the best way without changing php file? Maybe a way to display Logo: $logo_url and then somewhere set which is $logo_url for English, which for German etc.