彼は今休暇中でカナダの実家へ帰っている。って英語でなんて言うの？

"He's on vacation and is with his family in Canada" and "He is in Canada on a holiday with his family." are good ways to explain that he is on vacation with his family in Canada. He is on vacation and has gone to visit his family in Canada. This means that his had family that lives in Canada and has gone to pay them a visit on his vacation.

"My boyfriend is currently overseas, in Canada, with his family." Overseas is the same as abroad. So it would tell the listener your boyfriend is travelling.

It is best to keep answers short and " to the point" when asked a question;-D EG "My boyfriend is not around right now...He is on vacation with his family, in Canada!"

Visiting family in...' is a complete and common way to explain that somebody has family in a particular place and has taken a vacation to go and see them there.

"He is on a vacation" is a simple way of saying that he is away. It means that he is on a holiday and that he isn't home at the moment. After saying that, you can add where he is, why he is there or how long he will be away for.

To say you have gone somewhere else to relax then we can call this a 'vacation' or 'holiday' if you go somewhere you also say to 'visit' as you are not living/staying there for a long time

The two sentences you see provided above are terrific ways to express to your listener that your boyfriend is on vacation with his family in Canada. In the first sentence you will see the term right now. This means at the present moment. This word is commonly used in our everyday conversation, it would make a great addition to your vocabulary.