It´s easy:

1. Go to YouTube and type ¨any song name¨ + ¨lyrics.¨ You can listen to the song and watch the words, like karaoke.
2. Search the same words in Google for the song lyrics.
3. Highlight the lyrics from the Google search and copy (Ctrl+c) and paste (Ctrl+v) into Google Translate.
4. The translation is usually very good! Remember ¨poetic license¨ in music and poetry.