yeah I think consistency is the key. Know what you are doing. Mixing up medieval terms and technological terms at the same time, for example, might be weird in most cases. As in:
A-What doth thou say ye scavenger?
B-The hyperdrive was overheated, I had to disconnect it manually.
A-good now get the QRL prepared.
I think it's one of them issues where the choice is not the most important part. It is how you write it down.
simply: If you're not good at inventing languages then don't
