[booth:item] support URLs with language codes

gallery_dl/extractor/booth.py

@@ -44,8 +44,9 @@ class BoothExtractor(Extractor):
 
 class BoothItemExtractor(BoothExtractor):
     subcategory = "item"
-    pattern = r"(?:https?://)?(?:[\w-]+\.)?booth\.pm/(?:\w\w/)?items/(\d+)"
-    example = "https://booth.pm/items/12345"
+    pattern = (r"(?:https?://)?(?:[\w-]+\.)?booth\.pm/"
+               r"(?:[a-z]{2}(?:-[^/?#]+)?/)?items/(\d+)")
+    example = "https://booth.pm/ja/items/12345"
 
     def items(self):
         url = f"{self.root}/ja/items/{self.groups[0]}"
@@ -108,7 +109,7 @@ class BoothItemExtractor(BoothExtractor):
 
 class BoothShopExtractor(BoothExtractor):
     subcategory = "shop"
-    pattern = r"(?:https?://)?([\w-]+\.)booth\.pm/(?:\w\w/)?(?:items)?"
+    pattern = r"(?:https?://)?([\w-]+\.)booth\.pm/"
     example = "https://SHOP.booth.pm/"
 
     def __init__(self, match):

test/results/booth.py

@@ -199,6 +199,12 @@ https://www.melonbooks.co.jp/detail/detail.php?product_id=1872452""",
     "_fallback": "len:3",
 },
 
+{
+    "#url"     : "https://booth.pm/zh-cn/items/1895090",
+    "#comment" : "URL with language code",
+    "#class"   : booth.BoothItemExtractor,
+},
+
 {
     "#url"     : "https://wanoazayaka.booth.pm/",
     "#class"   : booth.BoothShopExtractor,