Remove [:de] from Title

Hey,

I have deinstalled the qtranslate and qtranslate yoast seo plugins, removed the tags from the database, but still have the [:de] tags in some titles. But I cant find them anywhere in the wp_posts database table.
No I have wpml installed and seo yoast installed.

I have already executed the sql commans found here
https://techjourney.net/fully-uninstall-remove-qtranslate-x-with-database-cleanup-of-unwanted-language-translations/

Here I see, that the langauge tag is within the <title> meta tag

https://www.dropbox.com/s/zjyh4q05k1u1x2p/Screenshot%202018-10-24%2010.08.56.png?dl=0

Would appreciate some advice!

Thanks in advance!

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