How to use "language" in a sentence

Sentences

They spoke a language which I did not understand

Captain Nemo spoke to the short man in their strange language, then the short man left us

They carried spears and shouted in a strange language

Suddenly I heard a voice shaking in that strange language

Suddenly, I thought I understood what the men below said in their strange language

He immediately started talking fast in a language that I couldn't understand, but he took me somewhere - past all the boats and the beach

The Star reported the crime in very sensational language: the killer was 'half beast, half man', a 'demon', or 'vampire'

Cosette sat down and began to read, enjoying the music of the language and the beauty of the handwriting

'Bad language was used.'

She speaks the language and knows a lot about China