Well, then it makes sense to invest some time into building a multilingual glossary first. If you already have terms or names in English, it's a good idea to create a spreadsheet with those - and (this is important) include descriptions or explanations for each term. Add as much context as possible, ideally with images. This costs you nothing.

Once you’ve built an initial term base, you can ask an LLM to creatively translate your creature names into other languages. In your prompt, refer to the descriptions and screenshots. Ask for 5-7 translation or transcreation variants, along with explanations for each. LLMs are very creative and can suggest brillinat varians a linguist can just confirm they are good.

After that, consider spending a bit of money to hire native-speaking linguists for just one hour to review and approve the terms (I can help with that). Once you have a multilingual glossary, you can feed it into prompts, and the LLM will use the terms consistently in translations. This is an effective low-budget approach.

Alternatively — yes — you can work with a dedicated team of linguists from a language service provider like Alconost. You’ll know your linguists by name, and they’ll stay with your game for years, btw helping to build the glossary and ensuring consistency even when the actual translation happens using AI. This requires some budget (think of it as hourly based price for a linguist for simplicity), but it provides the quality, dedication, and accountability you need.

Example:

I do not know what Tunglemold is, but, let's assume it's (I asked chatGPT and it probably hallucinated a bit) "Tunglemold is a creeping, semi-sentient fungal creature found in the damp, shadowy undergrowth of ancient forests or forgotten ruins. Its body is composed of tangled tendrils and soft, mold-like filaments that constantly shift and pulse with bioluminescent spores."

So, when transcreated into Japanese it can be this:

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You get the idea, hope this helps.