I would feel comfortable delivering production code in:

Php, Java, ruby, python, javascript, SQL, perl, pl/sql, and bash.

And have been paid to write them all over my career.

Not saying I wouldn't need a day or two to brush up on some of them (perl was pretty early in my career), but 6 languages isn't that large a number once you've been around for a decade or two, especially if you consult.