If you download and use a translation from translations.theeventscalendar.com and find that some things are still showing in English, it is probably because your language is not yet 100% translated.
The only way around this problem is to contribute missing translations for your language, or be patient and wait for other folks to do so. We check our translations site several times a week, and approve new translation contributions as fast as possible. Then you just need to download the latest file version and add it to your site.
If you cannot wait for others to contribute and want to add your own translations, you can start submitting strings in a matter of minutes. Check out our article on submitting translations.