Don't set locale if a link url already contains it

My terrible logic was polluting the URLs with an additional locale query parameter for each call when using e.g. everything()

src/pyzotero/zotero.py

@@ -331,6 +331,12 @@ def __init__(
         self.backoff = False
         self.backoff_duration = 0.0
 
+    def _check_for_component(self, url, component):
+        """Check a url path query fragment for a specific query parameter"""
+        if parse_qs(url).get(component):
+            return True
+        return False
+
     def _striplocal(self, url):
         if self.local:
             parsed = urlparse(url)
@@ -425,10 +431,15 @@ def _retrieve_data(self, request=None, params=None):
         self.self_link = request
         # ensure that we wait if there's an active backoff
         self._check_backoff()
-        if params:
-            params["locale"] = self.locale
-        if not params:
-            params = {"locale": self.locale}
+        # don't set locale if the url already contains it
+        if params and self.links:
+            if not self._check_for_component(self.links.get("next"), "locale"):
+                params["locale"] = self.locale
+        if not params and self.links:
+            if not self._check_for_component(self.links.get("next"), "locale"):
+                params = {"locale": self.locale}
+            else:
+                params = {}
         self.request = requests.get(
             url=full_url, headers=self.default_headers(), params=params
         )