Touch Bar input source language buttons

Hi there,
I switch different input sources (languages) and currently there's only one option to switch between them as long as I know.
I assign 'select next source in input menu' shortcut to a button.
It works fine so far, but as I use more than two languages, it becomes a little awkward to keep pressing this button until you find the right one.

So I'd appreciate it if there's a function to assign specific language to separate button (for example English, French etc.) that I can place on the Touch Bar.
This way I don't need to tap on the button for multiple times until you get the right one.

Or, if you guys know any workaround, please let me know!

Thank you!

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