diff --git a/crates/api_crud/src/site/update.rs b/crates/api_crud/src/site/update.rs
index 47915e434..2f0503952 100644
--- a/crates/api_crud/src/site/update.rs
+++ b/crates/api_crud/src/site/update.rs
@@ -76,7 +76,8 @@ impl PerformCrud for EditSite {
     let site_id = local_site.site_id;
     if let Some(discussion_languages) = data.discussion_languages.clone() {
       blocking(context.pool(), move |conn| {
-        SiteLanguage::update(conn, discussion_languages.clone(), site_id)
+        let site = Site::read(conn, site_id)?;
+        SiteLanguage::update(conn, discussion_languages, &site)
       })
       .await??;
     }
@@ -92,7 +93,7 @@ impl PerformCrud for EditSite {
       .build();
 
     blocking(context.pool(), move |conn| {
-      Site::update(conn, site_id, &site_form)
+      Site::update(conn, local_site.site_id, &site_form)
     })
     .await
     // Ignore errors for all these, so as to not throw errors if no update occurs
diff --git a/crates/apub/src/objects/instance.rs b/crates/apub/src/objects/instance.rs
index 521de64f3..de4839ada 100644
--- a/crates/apub/src/objects/instance.rs
+++ b/crates/apub/src/objects/instance.rs
@@ -159,7 +159,7 @@ impl ApubObject for ApubSite {
 
     let site = blocking(data.pool(), move |conn| {
       let site = Site::create(conn, &site_form)?;
-      SiteLanguage::update(conn, languages, site.id)?;
+      SiteLanguage::update(conn, languages, &site)?;
       Ok::<Site, diesel::result::Error>(site)
     })
     .await??;
diff --git a/crates/db_schema/src/impls/actor_language.rs b/crates/db_schema/src/impls/actor_language.rs
index 1de5c6aa6..6525a82d8 100644
--- a/crates/db_schema/src/impls/actor_language.rs
+++ b/crates/db_schema/src/impls/actor_language.rs
@@ -1,7 +1,7 @@
 use crate::{
   diesel::JoinOnDsl,
-  newtypes::{CommunityId, LanguageId, LocalUserId, SiteId},
-  source::{actor_language::*, language::Language},
+  newtypes::{CommunityId, InstanceId, LanguageId, LocalUserId, SiteId},
+  source::{actor_language::*, language::Language, site::Site},
 };
 use diesel::{
   delete,
@@ -81,17 +81,17 @@ impl SiteLanguage {
   pub fn update(
     conn: &mut PgConnection,
     language_ids: Vec<LanguageId>,
-    for_site_id: SiteId,
+    site: &Site,
   ) -> Result<(), Error> {
     conn.build_transaction().read_write().run(|conn| {
       use crate::schema::site_language::dsl::*;
       // Clear the current languages
-      delete(site_language.filter(site_id.eq(for_site_id))).execute(conn)?;
+      delete(site_language.filter(site_id.eq(site.id))).execute(conn)?;
 
       let lang_ids = convert_update_languages(conn, language_ids)?;
       for l in lang_ids {
         let form = SiteLanguageForm {
-          site_id: for_site_id,
+          site_id: site.id,
           language_id: l,
         };
         insert_into(site_language)
@@ -99,7 +99,7 @@ impl SiteLanguage {
           .get_result::<Self>(conn)?;
       }
 
-      CommunityLanguage::limit_languages(conn)?;
+      CommunityLanguage::limit_languages(conn, site.instance_id)?;
 
       Ok(())
     })
@@ -136,7 +136,7 @@ impl CommunityLanguage {
   /// also part of site languages. This is because post/comment language is only checked against
   /// community language, and it shouldnt be possible to post content in languages which are not
   /// allowed by local site.
-  fn limit_languages(conn: &mut PgConnection) -> Result<(), Error> {
+  fn limit_languages(conn: &mut PgConnection, for_instance_id: InstanceId) -> Result<(), Error> {
     use crate::schema::{
       community::dsl as c,
       community_language::dsl as cl,
@@ -145,7 +145,7 @@ impl CommunityLanguage {
     let community_languages: Vec<LanguageId> = cl::community_language
       .left_outer_join(sl::site_language.on(cl::language_id.eq(sl::language_id)))
       .inner_join(c::community)
-      .filter(c::local)
+      .filter(c::instance_id.eq(for_instance_id))
       .filter(sl::language_id.is_null())
       .select(cl::language_id)
       .get_results(conn)?;
@@ -343,7 +343,7 @@ mod tests {
     assert_eq!(184, site_languages1.len());
 
     let test_langs = test_langs1(conn);
-    SiteLanguage::update(conn, test_langs.clone(), site.id).unwrap();
+    SiteLanguage::update(conn, test_langs.clone(), &site).unwrap();
 
     let site_languages2 = SiteLanguage::read_local(conn).unwrap();
     // after update, site only has new languages
@@ -361,7 +361,7 @@ mod tests {
 
     let (site, instance) = create_test_site(conn);
     let test_langs = test_langs1(conn);
-    SiteLanguage::update(conn, test_langs.clone(), site.id).unwrap();
+    SiteLanguage::update(conn, test_langs.clone(), &site).unwrap();
 
     let person_form = PersonInsertForm::builder()
       .name("my test person".to_string())
@@ -399,7 +399,7 @@ mod tests {
     let conn = &mut establish_unpooled_connection();
     let (site, instance) = create_test_site(conn);
     let test_langs = test_langs1(conn);
-    SiteLanguage::update(conn, test_langs.clone(), site.id).unwrap();
+    SiteLanguage::update(conn, test_langs.clone(), &site).unwrap();
 
     let read_site_langs = SiteLanguage::read(conn, site.id).unwrap();
     assert_eq!(test_langs, read_site_langs);
@@ -431,7 +431,7 @@ mod tests {
 
     // limit site languages to en, fi. after this, community languages should be updated to
     // intersection of old languages (en, fr, ru) and (en, fi), which is only fi.
-    SiteLanguage::update(conn, vec![test_langs[0], test_langs2[0]], site.id).unwrap();
+    SiteLanguage::update(conn, vec![test_langs[0], test_langs2[0]], &site).unwrap();
     let community_langs2 = CommunityLanguage::read(conn, community.id).unwrap();
     assert_eq!(vec![test_langs[0]], community_langs2);
 
diff --git a/crates/db_schema/src/impls/site.rs b/crates/db_schema/src/impls/site.rs
index bea9a21c5..de53c19d0 100644
--- a/crates/db_schema/src/impls/site.rs
+++ b/crates/db_schema/src/impls/site.rs
@@ -26,7 +26,7 @@ impl Crud for Site {
       .get_result::<Self>(conn)?;
 
     // initialize with all languages
-    SiteLanguage::update(conn, vec![], site_.id)?;
+    SiteLanguage::update(conn, vec![], &site_)?;
     Ok(site_)
   }