That's true, learning languages also takes using them to remember them.  I feel I can use Portuguese fairly often, but Japanese, I guess I would have to meet people online who can speak it in order to practice it.

I learned English, German, Turkish and Spanish.

I can say that if you learned 1 language it really helps you learn another one...

But there s no point to learn several languages if you re not going to use them. I lost German and Turkish completely and as I don`t practise Spanish I am bad at it now((:

But am really trying to keep studying it.

Yeah for sure!  I do notice that knowing Spanish, French, and Chinese seem to be particularly useful besides English.  I guess it also depends what country you actually live in too of course.  I live in Canada and some jobs hire bilingual in French, but I have no motivation to learn the language.

Oops, I am sorry for mistake. I know Russian and Georgian. Georgian is used only in my country. I need it to be employed in state institutes, because Georgian is official language here. However, only 5 million people speak Georgian. There are not even similar languages in the world. I need Russian for more information. I can't even imagine my life without it. However, Russian isn't enough for promotion. That's why I am studying English now.

However, I understand you. Learning language is quite grueling work and motivation is pretty important thing. It's not easy to learn language without strong motivation only for travelling and intertaining.

I wonder why English, a language that hasn't been around as long as other languages, became the most useful language in the world.  I personally am learning Portuguese because a lot of my family speaks Portuguese.  I'm learning Japanese because I am fascinated by their culture and hope to live there teaching for a year or two.