diff --git a/Lib/fontTools/feaLib/builder.py b/Lib/fontTools/feaLib/builder.py
index 067c59708..e66c4c3b4 100644
--- a/Lib/fontTools/feaLib/builder.py
+++ b/Lib/fontTools/feaLib/builder.py
@@ -385,10 +385,6 @@ class Builder(object):
 
     def set_language(self, location, language, include_default, required):
         assert(len(language) == 4)
-        if self.cur_lookup_name_:
-            raise FeatureLibError(
-                "Within a named lookup block, it is not allowed "
-                "to change the language", location)
         if self.cur_feature_name_ in ('aalt', 'size'):
             raise FeatureLibError(
                 "Language statements are not allowed "
@@ -450,10 +446,6 @@ class Builder(object):
         self.lookupflag_ = value
 
     def set_script(self, location, script):
-        if self.cur_lookup_name_:
-            raise FeatureLibError(
-                "Within a named lookup block, it is not allowed "
-                "to change the script", location)
         if self.cur_feature_name_ in ('aalt', 'size'):
             raise FeatureLibError(
                 "Script statements are not allowed "
diff --git a/Lib/fontTools/feaLib/builder_test.py b/Lib/fontTools/feaLib/builder_test.py
index f3687c98d..58d3f2b22 100644
--- a/Lib/fontTools/feaLib/builder_test.py
+++ b/Lib/fontTools/feaLib/builder_test.py
@@ -51,7 +51,7 @@ class BuilderTest(unittest.TestCase):
         spec4h1 spec5d1 spec5d2 spec5fi1 spec5fi2 spec5fi3 spec5fi4
         spec5h1 spec6b_ii spec6d2 spec6e spec6f spec6h_ii spec6h_iii_1 spec8a
         spec9b spec9c1 spec9c2 spec9c3
-        bug463 bug502
+        bug463 bug501 bug502
     """.split()
 
     def __init__(self, methodName):
@@ -237,13 +237,6 @@ class BuilderTest(unittest.TestCase):
             "Script statements are not allowed within \"feature aalt\"",
             self.build, "feature aalt { script latn; } aalt;")
 
-    def test_script_in_lookup_block(self):
-        self.assertRaisesRegex(
-            FeatureLibError,
-            "Within a named lookup block, it is not allowed "
-            "to change the script",
-            self.build, "lookup Foo { script latn; } Foo;")
-
     def test_script_in_size_feature(self):
         self.assertRaisesRegex(
             FeatureLibError,
@@ -269,13 +262,6 @@ class BuilderTest(unittest.TestCase):
             "Language statements are not allowed within \"feature aalt\"",
             self.build, "feature aalt { language FRA; } aalt;")
 
-    def test_language_in_lookup_block(self):
-        self.assertRaisesRegex(
-            FeatureLibError,
-            "Within a named lookup block, it is not allowed "
-            "to change the language",
-            self.build, "lookup Foo { language RUS; } Foo;")
-
     def test_language_in_size_feature(self):
         self.assertRaisesRegex(
             FeatureLibError,
diff --git a/Lib/fontTools/feaLib/testdata/bug501.fea b/Lib/fontTools/feaLib/testdata/bug501.fea
new file mode 100644
index 000000000..58a4081fc
--- /dev/null
+++ b/Lib/fontTools/feaLib/testdata/bug501.fea
@@ -0,0 +1,8 @@
+# https://github.com/behdad/fonttools/issues/501
+languagesystem DFLT dflt;
+feature test {
+    lookup L {
+        script grek;
+        pos T 100;
+    } L;
+} test;
diff --git a/Lib/fontTools/feaLib/testdata/bug501.ttx b/Lib/fontTools/feaLib/testdata/bug501.ttx
new file mode 100644
index 000000000..33c3202e1
--- /dev/null
+++ b/Lib/fontTools/feaLib/testdata/bug501.ttx
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ttFont sfntVersion="true" ttLibVersion="3.0">
+
+  <GPOS>
+    <Version value="1.0"/>
+    <ScriptList>
+      <!-- ScriptCount=2 -->
+      <ScriptRecord index="0">
+        <ScriptTag value="DFLT"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="0"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+      <ScriptRecord index="1">
+        <ScriptTag value="grek"/>
+        <Script>
+          <DefaultLangSys>
+            <ReqFeatureIndex value="65535"/>
+            <!-- FeatureCount=1 -->
+            <FeatureIndex index="0" value="0"/>
+          </DefaultLangSys>
+          <!-- LangSysCount=0 -->
+        </Script>
+      </ScriptRecord>
+    </ScriptList>
+    <FeatureList>
+      <!-- FeatureCount=1 -->
+      <FeatureRecord index="0">
+        <FeatureTag value="test"/>
+        <Feature>
+          <!-- LookupCount=1 -->
+          <LookupListIndex index="0" value="0"/>
+        </Feature>
+      </FeatureRecord>
+    </FeatureList>
+    <LookupList>
+      <!-- LookupCount=1 -->
+      <Lookup index="0">
+        <!-- LookupType=1 -->
+        <LookupFlag value="0"/>
+        <!-- SubTableCount=1 -->
+        <SinglePos index="0" Format="1">
+          <Coverage>
+            <Glyph value="T"/>
+          </Coverage>
+          <ValueFormat value="4"/>
+          <Value XAdvance="100"/>
+        </SinglePos>
+      </Lookup>
+    </LookupList>
+  </GPOS>
+
+</ttFont>