I add a language to my resume once I've built a few real projects using it and feel comfortable enough with it that I can learn whatever I need to know for a gi

I add a language to my resume once I've built a few real projects using it and feel comfortable enough with it that I can learn whatever I need to know for a given task. If I'm not confident that the use of that language would not be an issue for me in any (realistic) task, it's not going on my resume.