"Er ist mein Bruder."

Translation: He is my brother.

[Otto_Didactyl]

He ain't heavy, er ist mein Bruder. Not quite the same ring to it.

[Yuebo]

How to tell is Bruder is singular or plural?

[duoderSie]

The plural is Brüder (with umlaut). Some words have the same plural (eg Spieler) These are usually masculine or neuter so that you can tell the difference from the article (eg mein Spieler/meine Speiler). But in this sentence the big give away is "er ist" which will always be singular.

[nuku.neko.rjw]

Bruder is singular, but when you add umulauts to the u, it becomes plural

[PabloDerChef]

Why not "Er ist meinen Bruder"?? Shouldn't we use the accusative case for a masculine noun

[Fredrik814103]

Ooops! I wrote Er isst mein Bruder and it was marked as correct but surely that means 'He eats my brother' and surely that is not the intended meaning of the phrase spoken?

[dariolloshi02]

Bro and brother are synnonyms

[allenfrang]

Er ist mein Bruder von einer anderen Mutter

[Alan822773]

He ain't heavy, he's my brrooooottthheerrrr