diff --git a/retroarch.c b/retroarch.c
index 7f88fa7f61..71ec58271f 100644
--- a/retroarch.c
+++ b/retroarch.c
@@ -3206,6 +3206,7 @@ static bool run_translation_service(void)
    memcpy(json_buffer+11+out_length, (const void*)rf2, 3*sizeof(uint8_t));
   
    {
+      bool prefix_set = false;
       char new_ai_service_url[PATH_MAX_LENGTH];
 
       strlcpy(new_ai_service_url,
@@ -3218,6 +3219,12 @@ static bool run_translation_service(void)
 
          if (!string_is_empty(lang_source))
          {
+            if (!prefix_set)
+            {
+               strlcat(new_ai_service_url, "?mode=fast",
+                     sizeof(new_ai_service_url));
+               prefix_set = true;
+            }
             strlcat(new_ai_service_url, "&source_lang=",
                   sizeof(new_ai_service_url));
             strlcat(new_ai_service_url, lang_source,
@@ -3232,6 +3239,12 @@ static bool run_translation_service(void)
 
          if (!string_is_empty(lang_target))
          {
+            if (!prefix_set)
+            {
+               strlcat(new_ai_service_url, "?mode=fast",
+                     sizeof(new_ai_service_url));
+               prefix_set = true;
+            }
             strlcat(new_ai_service_url, "&target_lang=",
                   sizeof(new_ai_service_url));
             strlcat(new_ai_service_url, lang_target,