lexiconsthe
The term "lexiconsthe" appears to be a misspelling or a non-standard term. In linguistics, a lexicon refers to the vocabulary of a language. It encompasses all the words, their meanings, and their grammatical properties. The plural form is "lexicons."
If "lexiconsthe" is intended to refer to multiple lexicons, it would be more accurately written as "lexicons."
The concept of a lexicon is fundamental to understanding how humans acquire, process, and produce language.