I also see this behaviour, and it is because the intial data imported has the Spanish ~n character in it. A patch is attached that fixes this for my locales, en and en_GB, by replacing the character with a regular 'n'.
-- Jonathan Wiltshire PGP/GPG: 0xDB800B52 / 4216 F01F DCA9 21AC F3D3 A903 CA6B EA3E DB80 0B52 Sending of encrypted mail is encouraged
Index: gourmet-0.14.2/src/lib/defaults/defaults_en.py
===================================================================
--- gourmet-0.14.2.orig/src/lib/defaults/defaults_en.py 2008-12-25
01:28:56.000000000 +0000
+++ gourmet-0.14.2/src/lib/defaults/defaults_en.py 2008-12-25
01:29:04.000000000 +0000
@@ -186,7 +186,7 @@
["green pepper","bell pepper, green","produce"],
["red bell pepper","bell pepper, red","produce"],
["chilli pepper","chilli pepper","produce"],
- ["jalapeño pepper","pepper, jalapeño","produce"],
+ ["jalapeno pepper","pepper, jalapeno","produce"],
["habanero pepper","pepper, habanero","produce"],
["radicchio","radicchio","produce"],
["rapini","rapini","produce"],
Index: gourmet-0.14.2/src/lib/defaults/defaults_en_GB.py
===================================================================
--- gourmet-0.14.2.orig/src/lib/defaults/defaults_en_GB.py 2008-12-25
01:29:11.000000000 +0000
+++ gourmet-0.14.2/src/lib/defaults/defaults_en_GB.py 2008-12-25
01:29:20.000000000 +0000
@@ -121,7 +121,7 @@
["pepper","pepper","produce"],
["red bell pepper","red bell pepper","produce"],
["chilli pepper","chilli pepper","produce"],
- ["jalapeño pepper","pepper, jalapeño","produce"],
+ ["jalapeno pepper","pepper, jalapeno","produce"],
["habanero pepper","pepper, habanero","produce"],
["radicchio","radicchio","produce"],
["rapini","rapini","produce"],
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