This is the 6911th most frequent French word.
luka
"Luka" is not a standard French word. It might be a proper name.
It is used as a proper noun, referring to a person's name in the sentence.
Luka joue au football avec ses amis après l'école.
Luka plays football with his friends after school.
'Luka' remains a proper noun, designating the name of a specific individual.
La chanteuse Luka interprète une nouvelle chanson ce soir.
The singer Luka is performing a new song tonight.
'Luka' is again a proper noun, used to address or refer to an individual by name.