Please capitalize where necessary: worldlingo's chairman said the joint venture with showstar's webmail system is an unbeatable combination.
A: WorldLingo's Chairman said the joint venture with Showstar's WebMail system is an unbeatable combination.

Please capitalize where necessary: a police car escapes full with aliens. chase and shoot them.
A: A police car escapes full with aliens. Chase and shoot them.

Please capitalize where necessary: multilingual phrases in local languages
A: Multilingual phrases in local languages

Please capitalize where necessary: his wife is mentioned as being twenty years old in 1940-41 and possibly she is still alive.
A:
His wife is mentioned as being twenty years old in 1940-41 and possibly she is still alive.