That does not lower the quality of the distribution itself, does it?
Last time I used Deepin, I did not see a single thing in Chinese within the distribution. Maybe it is a bug in the new installation or there was a user error during and/or after installation.
The Deepin products are optional and just another bonus in this distribution. If you are used to other File Managers, you are free to use them in Deepin, as well.
That said, I think that the Deepin Terminal is the overall best GUI terminal that exists in the entire Linux world, as of this moment.