2 sentences

1. 我的母语是捷克语。

   wǒ​de mǔ​yǔ shì jié​kè​yǔ.

   My native language is Czech.

   Source: Tatoeba

2. 他们说捷克语。

   tā​men shuō jié​kè​yǔ.

   They speak Czech.

   Source: CCMatrix