feat: Add Bengali Language Support. This fixes #17717 (#20567)

docs/api-reference/v2/openapi.json

@@ -13011,7 +13011,8 @@
               "sk",
               "ta",
               "uk",
-              "zh-TW"
+              "zh-TW",
+              "bn"
             ],
             "type": "string",
             "example": "en"
@@ -13130,7 +13131,8 @@
               "sk",
               "ta",
               "uk",
-              "zh-TW"
+              "zh-TW",
+              "bn"
             ],
             "type": "string",
             "example": "en"
@@ -13278,7 +13280,8 @@
               "sk",
               "ta",
               "uk",
-              "zh-TW"
+              "zh-TW",
+              "bn"
             ],
             "type": "string",
             "example": "en"
@@ -22021,7 +22024,8 @@
               "sk",
               "ta",
               "uk",
-              "zh-TW"
+              "zh-TW",
+              "bn"
             ],
             "description": "The preferred language of the attendee. Used for booking confirmation.",
             "example": "it",