diff --git a/lib/linguist/languages.yml b/lib/linguist/languages.yml
index 7e8aecc6..810f6685 100644
--- a/lib/linguist/languages.yml
+++ b/lib/linguist/languages.yml
@@ -1850,6 +1850,8 @@ Parrot Internal Representation:
   - pir
   extensions:
   - .pir
+  interpreters:
+  - parrot
 
 Pascal:
   type: programming
@@ -1892,6 +1894,8 @@ Perl6:
   - .p6m
   - .pl6
   - .pm6
+  interpreters:
+  - perl6
 
 PigLatin:
   type: programming
@@ -1952,6 +1956,8 @@ Prolog:
   - .ecl
   - .pro
   - .prolog
+  interpreters:
+  - swipl
 
 Propeller Spin:
   type: programming