Wikipedia:Babel
ja この利用者は日本語母語としています
en-3 This user is able to contribute with an advanced level of English.
pt-0 Este utilizador não compreende o português, ou o compreende com dificuldades consideráveis.

I have been active in "sports interwiki" (mainly tennis and golf) with my IP addresses. I took this login name to move Björn Borg. However, they have changed so often...I decided to take part in Portuguese Wikipedia with this login name.

I started to write tennis articles in Japanese Wikipedia since November 2004; I wrote their Japanese Version myself.