Propose changing the défaut contribution language when switching countries

[teolemon]

Problem

From Yaron:
"Hey everyone, I wanted to raise a concern about the app and web behavior; most of the products documented in Israel have their image tagged as English, even though the product is clearly in Hebrew. Is there a way to configure a default language for image tagging in the app? Is there an easy way to change the language using the web interface? Thanks :)"

[monsieurtanuki]

@teolemon Different topics here.

Should we suggest an app language change when the user changes countries, the way we do with currency? (cf. your screenshot)
Small difference: there's one currency per country but potentially several languages.

Should we consider an additional "product language", or a contextual default language?
Typical use case: I'm French, I speak a bit of Italian, I visit Italy and scan italian products, and I shouldn't have to switch the whole app to Italian just to consider Italian as the most probable language for each new product image or translation.
In that case it's already been deal with in #4996 and its "sticky" language.

Which direction should we go, then?

[yarons]

I also think that the list of languages should be sorted by priority (usage/country/both) instead of alphabetically, I am more likely to document products in the languages I used before rather than browse through the list to the same location and I'm also trying to think of a way to make the user aware of the chosen language before saving, otherwise the default is English regardless of the product language.

[monsieurtanuki]

I also think that the list of languages should be sorted by priority (usage/country/both) instead of alphabetically, I am more likely to document products in the languages I used before rather than browse through the list to the same location and I'm also trying to think of a way to make the user aware of the chosen language before saving

@yarons Somehow already in place since #4996.
We could go a step beyond with explicit "user favorite languages" that would always go on top of the language lists.

otherwise the default is English regardless of the product language.

There's no default language, it's always the selected language.

[yarons]

Indeed so what happens is that they're using the app in English, taking photos in Hebrew and they are completely unaware :)

[monsieurtanuki]

@yarons Understood as a different use case (not the tourist case): countries where users would use the app in English (and not in their native language) but with products predominantly not in English.
That said, the language is already explicit in the following pages. What are your suggestions?

existing image	no image

[monsieurtanuki]

@yarons This is what I suggest: reordering the languages so that the current country languages are more or less on the top of the list.
What do you think of it?

[yarons]

Good call!
Regarding the misclassified item: if there's a way to try and detect the languages on the product + barcode country and suggest accordingly, it would be awesome, but I know it's too much to ask so let's keep it as a fantasy for now :)

[monsieurtanuki]

Good call!

Thank you! That's rather easy to implement, too.

Regarding the misclassified item: if there's a way to try and detect the languages on the product + barcode country and suggest accordingly, it would be awesome, but I know it's too much to ask so let's keep it as a fantasy for now :)

Don't ask me, ask @teolemon instead, who in those cases typically summons the power of MLKit.

[teolemon]

It's not at all a fantasy, it's an out of the box library for Flutter :-)
We already use the scanner component of the library through a Dart package
https://developers.google.com/ml-kit/vision/text-recognition/v2