Problem with url translation

I’ll make some example in order to explain the problem, because with no geographic slugs listings are missing (the server response is epic 404 error):

From the main category page http://curiocity.travel/museums/
Then click on:
http://curiocity.travel/museums/italy/tuscany/siena/ospedale-santa-maria-della-scala-santa-maria-della-scala-hospital/

Switch language to italian and you’ll have epic 404 error for the following link:
http://curiocity.travel/it/musei/ospedale-santa-maria-della-scala/

Just to sum: the problems are 2. Above all, the gegraphic slugs in the url for the 3 categories CPT attractions, museums and artworks, that is missing in other languages but no english.
Second problem, when I click to switch in italian (or other languages), I have epic 404.

I can give you some other examples in addition to http://curiocity.travel/museums/italy/tuscany/siena/ospedale-santa-maria-della-scala-santa-maria-della-scala-hospital/:

ENG http://curiocity.travel/museums/italy/tuscany/siena/archivio-di-stato-di-siena-state-archives-of-siena/
switch to ITA http://curiocity.travel/it/musei/archivio-di-stato-di-siena/

ENG http://curiocity.travel/attractions/italy/tuscany/florence/belvedere-fort/
switch to ITA http://curiocity.travel/it/attrazioni/belvedere-fort/

ENG http://curiocity.travel/artworks/italy/tuscany/florence/dunce/
switch to ITA http://curiocity.travel/it/opere-arte/zuccone/

Dear Stiofan , thanks in advance for your support

unfortunately we have to solve this problem as soon as possible.

I’m writing to give you more information to solve the problem.
In fact we also had a second problem, which we solved.
This second problem may be related to the first main problem.

-SECOND PROBLEM Fixed-
The English version of the GD Detail elements GD Detail show the linked picture element,
while other versions (FRA, ITA, GER, POR, SPA, RUS) did not show the picture related to GD Detail element.

This problem happend only to the elements of the categories created in 2015, “Museums”,
“Artworks” and “Attractions”, while the problem did not happen to other categories created recently in 2016.

We noticed that the image of the English version of a GD Detail element (“Museums”,
“Artworks” and “Attractions” categories) was linked to the image folder wp-content / uploads / 2015/08 and
it properly worked , while the version in other languages did not worked because it had a link to a
wrong folder wp-content / uploads / 2015/09. (watch out the final 09)
Foe Example
the Museum Aceh
http://curiocity.travel/museums/indonesia/nanggroe-aceh-darussalam/banda-raya/aceh-museum/

We do not know the reason why this link was changed from 08 to 09.
We simply copied the pictures from the 2015/08 folder in the folder 2015/09 and we fixed the problem

Since the problem of slug and geografical path happens to the same three categories and translations (FRA, spa, por, eng, rus. Ger) of GD detail elements, while the gd detail element works well in English, so I thought that the problems they are connected.

Thanks in advance for your suppport.

best regards