The app should send the two letters language code instead of the extended one

[teolemon]

The product name is not loaded for some languages. I've opened a bug to solve this server side: openfoodfacts/openfoodfacts-server#4091

The app should send only the two letters language code (eg. "en" or "it" or "fr") instead of the extended one ("en-US", "it-IT").

Examples

2020-08-30 14:12:34.559 14146-21396/? D/OkHttp: --> GET https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_b%2Bsr%2BLatn%2Cproduct_name_b%2Bsr%2BLatn
2020-08-30 14:12:34.607 14146-21396/? D/OkHttp: <-- 200 https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_b%2Bsr%2BLatn%2Cproduct_name_b%2Bsr%2BLatn (47ms, unknown-length body)
2020-08-30 14:13:09.827 14146-21396/? D/OkHttp: --> GET https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_nl-BE%2Cproduct_name_nl-BE
2020-08-30 14:13:09.885 14146-21396/? D/OkHttp: <-- 200 https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_nl-BE%2Cproduct_name_nl-BE (57ms, unknown-length body)
2020-08-30 14:13:33.953 14146-21396/? D/OkHttp: --> GET https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_pt-BR%2Cproduct_name_pt-BR
2020-08-30 14:13:34.051 14146-21396/? D/OkHttp: <-- 200 https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_pt-BR%2Cproduct_name_pt-BR (97ms, unknown-length body)
2020-08-30 14:13:49.761 14146-21396/? D/OkHttp: --> GET https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_zh-CN%2Cproduct_name_zh-CN
2020-08-30 14:13:49.808 14146-21396/? D/OkHttp: <-- 200 https://ssl-api.openfoodfacts.org/api/v0/product/3700946806496.json?fields=ingredients_text_zh-CN%2Cproduct_name_zh-CN (46ms, unknown-length body)

[teolemon]

We're going to have to implement our own workaround for now.

[teolemon]

#2789 is related