Is there a easy way to change my blog content from English to other languages?

So I run a small blog where i post about water quality, types of filters, fluoride in water etc.

I’d like to convert the same content in many other languages like French, Spanish and German.

Is there any easy way to re write the same content without spending so much time?

Since the content is mostly in English, Google translate works good but its not accurate enough specially for complicated articles like this “BPA-Free Water Bottles”.

Is there any way to minimize time and cost? Or hiring editors is the only way forward?

I suggest you go to upwork.com and post your requirements there. Make sure you state that you want someone fluent in the language you want to be translated. You should get quite a lot of replies. They will also reply with what they will charge. You are not committed to using anyone.