Update command docstrings and localization keys

Improved docstrings for 'play' and 'search' commands in basic.py for clarity. Updated localization keys and translations in es-419.json, es-ES.json, and zh-CN.json to fix punctuation, naming consistency, and minor translation errors.

local_langs/es-419.json

@@ -4,7 +4,7 @@
     "channel": "canal",
     "Provide a channel to connect.": "Proporciona un canal para conectar.",
     "play": "reproducir",
-    "Loads your input into the queue": "Carga tu entrada en la cola.",
+    "Loads your input into the queue.": "Carga tu entrada en la cola.",
     "Searches your query and displays the results.": "Busca tu consulta y muestra los resultados.",
     "query": "consulta",
     "Input a query or a searchable link.": "Ingresa una consulta o un enlace de búsqueda.",
@@ -93,7 +93,7 @@
     "title": "titulo",
     "Searches for your query and displays the reutned lyrics.": "Busca tu consulta y muestra la letra encontrada.",
     "artist": "artista",
-    "swapdj": "cambiar_dj",
+    "swapdj": "cambiardj",
     "Transfer dj to another.": "Transfiere el DJ a otro.",
     "Choose a member to transfer the dj role.": "Elige un miembro para transferir el rol de DJ.",
     "autoplay": "reproduccion_auto",