Then, after that, you can choose the idiom you'd like to add. There's lots and lots of idioms (as you can see on the sixth picture), but I'll choose for this example German from Swiss-land (as you can see on the seventh picture). After that you can click on the pencil icon and a new window will appear, just as shown on the eight picture. Click on auto translation and then publish.

DONE! You've successfully add subtitles to your video, in a easy way and also translated these subtitles into any idiom you want. Not all idioms have the auto translation feature, but the main ones like English, Spanish, French, German, Italian, and the best of all Brazilian Portuguese have. Please do it digimon company! You'll add so much quality to your youtube videos as well make us international fans happy!

Then, the idiom tab will appear, click on the blue button that says add idiom. (as shown on the fifth picture).

On the youtube channel page lick on the video you want to add subtitles. Then, lick on the subtitles tabs as shown on the first picture.. Than an option named automatic synchronization will appear, as seem on the second picture. Then, just paste the whole text on the white space, as shown on the third picture. Click on publish (the blue button on top) and wait a little.
After that, back on the videos option there will appear an option to manage idioms for subtitles (as shown on the fourth picture.