> Currently, there are nearly 8000 lexemes in Wikidata.

There is, right now, 44262 lexemes entity (query: http://tinyurl.com/y692kszu), including 42 in Portuguese (query: http://tinyurl.com/y2f3636e) and in a total of 321 languages (it already is one of the biggest database if you count the number of languages).
In total, there is 120 391 forms for these 44k+ lexemes (query:http://tinyurl.com/y5xudhwg far from the biggest databases but already an impressive number as almost everything has been done by hand and in less than a year!).

> If there is not a person who can work to change this situation, it will take years to let LexData represent the main ten languages including Portuguese.

There is already a lot of person working on Lexemes in Wikidata (I'm actually working on Breton).
But true, there is also a lot to do!
You're welcome to join us, the project page is here: https://www.wikidata.org/wiki/Wikidata:Lexicographical_data.

Cheers, ~nicolas