When to use quotation marks?

Use quotation marks only when  speaker  is quoting textually. Use  double  apostrophes as it.

For example: 

Article 14: "It is allowed to..." 

or in: 

My uncle said: "It's really hot today", and I said: "Yes, it is".

Never use quotation marks to indicate indirect quotes, single words or in another language, titles of books or movies, proper names, and so on. You should only use quotation marks when the speaker textually quotes something that someone said or reads a text out loud.