Philosophy of Language Vs. Linguistic Philosophy

The subject matter of 'Philosophy of language' encompasses the answers of the following questions among others.

1. How to obtain the meaning of a word?
2. How to obtain the meaning of an expression?
3. How does a hearer understand the speaker's utterances?
4. What are the differences found between a meaningful string of words and a meaningless one?
5. Do sentences necessarily satisfy the truth-evaluability criterion to confer meanings?