Rationalize tmdb and opensubtitles Chinese languages

See nova-video-player/aos-AVP#1129

See nova-video-player/aos-AVP#1228

res/values/strings.xml

@@ -378,6 +378,10 @@
     <string name="s_chinese">Chinese</string>
     <string name="s_chinese_simplified">Simplified Chinese</string>
     <string name="s_traditional_chinese">Traditional Chinese</string>
+    <string name="s_chinese_bilingual">Chinese bilingual</string>
+    <string name="s_chinese_mainland">Chinese (Mainland China)</string>
+    <string name="s_chinese_hk">Chinese (Hong Kong)</string>
+    <string name="s_chinese_tw">Chinese (Taiwan)</string>
     <string name="s_spanish_la">Spanish (LA)</string>
     <string name="s_extremaduran">Extremaduran</string>
     <string name="s_montenegrin">Montenegrin</string>
@@ -388,7 +392,6 @@
     <string name="s_santali">Santali</string>
     <string name="s_syriac">Syriac</string>
     <string name="s_toki_pona">Toki Pona</string>
-    <string name="s_chinese_bilingual">Chinese bilingual</string>
     <string name="s_none">None</string>
 
     <!-- Player errors -->

src/main/java/com/archos/mediacenter/video/utils/VideoPreferencesCommon.java

@@ -96,14 +96,29 @@ public class VideoPreferencesCommon implements OnSharedPreferenceChangeListener
 
     // update with: `curl --request GET --url https://api.opensubtitles.com/api/v1/infos/languages | jq -r '.data[].language_code' | sort -u | gpaste -sd "|"`
     // list exceptions via `| grep -E '.{3,}' | gpaste -sd "|"` "zh-cn|pt-pt|pt-br|zh-tw"
-    private static final String OPENSUBTITLES_LANGUAGES = "ab|af|an|ar|as|at|az|be|bg|bn|br|bs|ca|cs|cy|da|de|ea|el|en|eo|es|et|eu|ex|fa|fi|fr|ga|gd|gl|he|hi|hr|hu|hy|ia|id|ig|is|it|ja|ka|kk|km|kn|ko|ku|lb|lt|lv|ma|me|mk|ml|mn|mr|ms|my|ne|nl|no|nv|oc|or|pl|pm|pr|ps|pt-br|pt-pt|ro|ru|sd|se|si|sk|sl|so|sp|sq|sr|sv|sw|sx|sy|ta|te|th|tk|tl|tp|tr|tt|uk|ur|uz|vi|ze|zh-cn|zh-tw";
+    private static final String OPENSUBTITLES_LANGUAGES = "ab|af|an|ar|as|at|az|be|bg|bn|br|bs|ca|cs|cy|da|de|ea|el|en|eo|es|et|eu|ex|fa|fi|fr|ga|gd|gl|he|hi|hr|hu|hy|ia|id|ig|is|it|ja|ka|kk|km|kn|ko|ku|lb|lt|lv|ma|me|mk|ml|mn|mr|ms|my|ne|nl|no|nv|oc|or|pl|pm|pr|ps|pt-br|pt-pt|ro|ru|sd|se|si|sk|sl|so|sp|sq|sr|sv|sw|sx|sy|ta|te|th|tk|tl|tp|tr|tt|uk|ur|uz|vi|ze|zh-cn|zh-tw|zh-ca";
 
     // see https://developer.themoviedb.org/docs/languages
     // curl --request GET --url 'https://api.themoviedb.org/3/configuration/languages?api_key=APIKEY' | jq '.[] | .iso_639_1' | sed 's/"\([^"]*\)"/\1/g' | grep -v mo | grep -v xx | sort -u | paste -sd "|" -
     // to do after: add manually pt-br and substitute cn=zh-tw and zh=zh-cn
     // zh = Mandarin -> Chinese Simplified (zh-cn) or Chinese
     // cn = Cantonese -> Chinese Traditional (zh-tw)
-    public final static String TMDB_LANGUAGES = "aa|ab|ae|af|ak|am|an|ar|as|av|ay|az|ba|be|bg|bi|bm|bn|bo|br|bs|ca|ce|ch|zh-tw|co|cr|cs|cu|cv|cy|da|de|dv|dz|ee|el|en|eo|es|et|eu|fa|ff|fi|fj|fo|fr|fy|ga|gd|gl|gn|gu|gv|ha|he|hi|ho|hr|ht|hu|hy|hz|ia|id|ie|ig|ii|ik|io|is|it|iu|ja|jv|ka|kg|ki|kj|kk|kl|km|kn|ko|kr|ks|ku|kv|kw|ky|la|lb|lg|li|ln|lo|lt|lu|lv|mg|mh|mi|mk|ml|mn|mr|ms|mt|my|na|nb|nd|ne|ng|nl|nn|no|nr|nv|ny|oc|oj|om|or|os|pa|pi|pl|ps|pt|pt-br|qu|rm|rn|ro|ru|rw|sa|sc|sd|se|sg|sh|si|sk|sl|sm|sn|so|sq|sr|ss|st|su|sv|sw|ta|te|tg|th|ti|tk|tl|tn|to|tr|ts|tt|tw|ty|ug|uk|ur|uz|ve|vi|vo|wa|wo|xh|yi|yo|za|zh-cn|zu";
+    public final static String TMDB_LANGUAGES = "aa|ab|ae|af|ak|am|an|ar|as|av|ay|az|ba|be|bg|bi|bm|bn|bo|br|bs|ca|ce|ch|zh-tw|co|cr|cs|cu|cv|cy|da|de|dv|dz|ee|el|en|eo|es|et|eu|fa|ff|fi|fj|fo|fr|fy|ga|gd|gl|gn|gu|gv|ha|he|hi|ho|hr|ht|hu|hy|hz|ia|id|ie|ig|ii|ik|io|is|it|iu|ja|jv|ka|kg|ki|kj|kk|kl|km|kn|ko|kr|ks|ku|kv|kw|ky|la|lb|lg|li|ln|lo|lt|lu|lv|mg|mh|mi|mk|ml|mn|mr|ms|mt|my|na|nb|nd|ne|ng|nl|nn|no|nr|nv|ny|oc|oj|om|or|os|pa|pi|pl|ps|pt|pt-br|qu|rm|rn|ro|ru|rw|sa|sc|sd|se|sg|sh|si|sk|sl|sm|sn|so|sq|sr|ss|st|su|sv|sw|ta|te|tg|th|ti|tk|tl|tn|to|tr|ts|tt|tw|ty|ug|uk|ur|uz|ve|vi|vo|wa|wo|xh|yi|yo|za|zh-cn|zh-hk|zu";
+
+    // basic Chinese howto
+    // zh-cn Chinese (Mainland China): Mandarin (mostly in Simplified charset)
+    // zh-tw Chinese (Taiwan): Min (mostly in Traditional charset)
+    // zh-hk Chinese (Hong Kong): Cantonese
+    // Character set = Simplified or Traditional
+    // opensubtitles
+    // zh-ca = Chinese (Cantonese) -> zh-hk Chinese (Hong Kong),
+    // zh-cn = Chinese (simplified) -> zh-cn Chinese (Mainland China),
+    // zh-tw = Chinese (traditional) -> zh-tw Chinese (Taiwan)
+    // ze = Chinese bilingual -> Chinese Cantonese + English
+    // tmdb (proposed by Yu)
+    // do not use zh Mandarin = zh-cn, Chinese (Mainland China)
+    // do not use cn Cantonese = zh-hk, Chinese (Hong Kong)
+    // add zh-tw, Chinese (Taiwan)
 
     // should we provide adaptive refresh rate for all (not only on TV)
     private static final boolean REFRESHRATE_FORALL = true;