diff --git a/interim/source_strings.yaml b/interim/source_strings.yaml
index 50336486..46c30527 100644
--- a/interim/source_strings.yaml
+++ b/interim/source_strings.yaml
@@ -3119,6 +3119,10 @@ en:
           gravel: Gravel
           # surface=ground
           ground: Ground
+          # surface=metal
+          metal: Metal
+          # surface=mud
+          mud: Persistently Muddy
           # surface=paved
           paved: Paved
           # surface=paving_stones
@@ -3127,10 +3131,16 @@ en:
           salt: Salt
           # surface=sand
           sand: Sand
+          # surface=sett
+          sett: Sett
+          # surface=unhewn_cobblestone
+          unhewn_cobblestone: Cobblestone (uncut, rounded stones)
           # surface=unpaved
           unpaved: Unpaved
           # surface=wood
           wood: Wood
+          # surface=woodchips
+          woodchips: Woodchips
         terms: '[translate with synonyms or related terms for ''Surface'', separated by commas]'
       surveillance:
         # surveillance=*