[languages] Moving language id methods into a separate package

scripts/geodata/language_id/polygon_lookup.py

@@ -0,0 +1,19 @@
+import operator
+
+
+def country_and_languages(language_rtree, latitude, longitude):
+    props = language_rtree.point_in_poly(latitude, longitude, return_all=True)
+    if not props:
+        return None, None, None
+
+    country = props[0]['qs_iso_cc'].lower()
+    languages = []
+
+    for p in props:
+        languages.extend(p['languages'])
+
+    # Python's builtin sort is stable, so if there are two defaults, the first remains first
+    # Since polygons are returned from the index ordered from smallest admin level to largest,
+    # it means the default language of the region overrides the country default
+    default_languages = sorted(languages, key=operator.itemgetter('default'), reverse=True)
+    return country, default_languages, props