Error coin condition French-English

Hi,

I just realized that the condition of the coins are translated from French to English as followed:
B --> VG
TB --> F
TTB --> VF
SUP --> XF

Many of my swap coins are in "TB" condition which I thought was equivalent to "VF" in English. But Numista translate it to "F" only.

Is this normal?

Thanks for your reply,

Vincent