If you ask about the meaning of this sentence:
"私の日本語はいいですか?" means "Is my Japanese good?".
Explanation:
1. 私 (watashi) means I
2. の (no) is a preposition to indicate the possession
=> 私の + Noun = my + Noun
3. 日本語 (niihongo) means Japanese
=> The phrase "私の日本語" means "my Japanese"
4. は (wa) in Japanese is used as "be" in English
5. いい (ii) means "good, okay, nice"
6. N + ですか? - a question word used in question.
