is this actually confirmed by Google or your own research?
This the same rationale as the footer links have lower weight than top navigation links. And that pages are read from left to right and top to bottom. I'm sure I have read Google comments about it in the last 15 years. Its one of those things a renowned SEO expert thought & showed me a long time ago. But its confirmed by my own findings. The weight difference is not massive. However things may change with any google update and we are always left to guess and check.
Now I disagree strongly about the translation, I spend a lot of time in finding the Dutch words that are best suited based on the context they are used in.
I do not mean to criticize your efforts as I know how much work it is to translate such packs. I am Dutch BTW.
Google translations are often really bad. 'Opmerkelijk' is not an accurate translation of Notable. Opmerkelijk means that there is a reason to note the thing or person. This reason can be positive or negative. In Dutch its more often used in a negative sense than positive. The intent of the notable members functionality is to list members of repute in the positive sense. With the translation of the word 'notable' the 'worthy' aspect of its meaning is important and gives it a positive meaning.
I do realize that you have translated it for your site and may have specific purposes relating to whats optimal for your site. So maybe this is not a good example.
As the wikipedia article and a google search for 'lichtbak' will show, the term generally relates to a Plexiglas casing with lights in it. Generally used to highlight print and advertising. It does not relate to the image zooming feature that it's supposed to describe.
What I think is important here is that Google understands it as such and as your big board has tens of thousands of instances of this word, your site is indexed accordingly. This does dilute the performance of your website in Google. Your site may have excellent ranking and you can afford to ignore this factor.
If you then consider that this is the case for many translated words and phrases then this gives an idea of how large the impact of a language pack can be. Especially for sites that do not have as much authority as yours.
