Vendor view page, Language pairs

On this tab, you can define the language pairs a specific vendor provides:

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By default, a vendor works with all language pairs. To change it, please use the "toggle" button:

Then press "Update":

Unmark the services the vendor does not provide and press "Update" again:

You can select the language pairs only from the ones already specified in your account. To update the list of all language pairs, please go to Settings -> System values -> [Language pairs].