Because Tai-Lue people live in Northern for a long time. They use both their own dialect and Kham-Mueng (Northern Thai) language. Some vocabularies they use Tai-Lue language. Some vocabularies they use Kham-Mueng (Northern-Thai) language. They use Tai-Lue language for communicate with family and relatives. And use Kham-Mueng language for communicate with friends and acquaintance. But the older will be still only use Tai-Lue language for communicate.