If you limit it to languages you know, you're adding 1 or 2 bits of entropy. If you expand it to languages you don't know, you're adding a couple more bits but

If you limit it to languages you know, you're adding 1 or 2 bits of entropy. If you expand it to languages you don't know, you're adding a couple more bits but making it much harder to remember. If you stick to one language and add a fourth word, you're adding 10+ bits of entropy (depending on the size of the word list you're choosing randomly from).