diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 9411dfad9..d26de3e70 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -29,6 +29,15 @@ jobs:
     - run: nix-env -f default.nix -iA spellcheck
     - run: postgrest-docs-spellcheck
 
+  dictcheck:
+    name: Run dictcheck
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v21
+      - run: nix-env -f default.nix -iA dictcheck
+      - run: postgrest-docs-dictcheck
+
   linkcheck:
     name: Run linkcheck
     if: github.base_ref == 'main'
diff --git a/.gitignore b/.gitignore
index 4c1f95600..ccba409df 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ Pipfile.lock
 *.log
 diagrams/db.pdf
 misspellings
+unuseddict
diff --git a/default.nix b/default.nix
index 5dffe887a..42fbaca76 100644
--- a/default.nix
+++ b/default.nix
@@ -73,7 +73,9 @@ in
          | tail -n+2 \
          | tr '\n' '\0' \
          | xargs -0 -n 1 -i \
-           sh -c "grep \"{}\" $FILES > /dev/null || echo \"{}\""
+           sh -c "grep \"{}\" $FILES > /dev/null || echo \"{}\"" \
+         | tee unuseddict
+        test ! -s unuseddict
       '';
 
   linkcheck =
diff --git a/postgrest.dict b/postgrest.dict
index fad0d5b6b..52956e941 100644
--- a/postgrest.dict
+++ b/postgrest.dict
@@ -1,6 +1,4 @@
 personal_ws-1.1 en 0 utf-8
-Adossi
-AMQP
 api
 API's
 Archlinux
@@ -10,7 +8,6 @@ auth
 authenticator
 backoff
 balancer
-Beles
 booleans
 Bouscal
 buildpack
@@ -19,21 +16,16 @@ Cardano
 cd
 centric
 changelog
-colocality
-ClojureScript
 Cloudfare
-cloudfared
 config
 CORS
 CPUs
 cryptographically
 CSV
-Daemonizing
 DDL
 DevOps
 DiBiase
 dockerize
-DoS
 eq
 ETH
 Ethereum
@@ -54,7 +46,6 @@ Greenplum
 gte
 GUC
 gucs
-Gumbs
 Haskell
 Heroku
 HMAC
@@ -80,9 +71,6 @@ JSON
 JWK
 JWT
 jwt
-JWTs
-Kinesis
-Kofi
 Kubernetes
 localhost
 login
@@ -92,23 +80,18 @@ logins
 lon
 lt
 lte
-middleware
 misprediction
-Mithril
 multi
-MVCC
 namespace
 namespaced
 Nanos
 neq
 nginx
-ngrep
 nixpkgs
 npm
 nxl
 nxr
 OAuth
-onwards
 OpenAPI
 openapi
 ORM
@@ -117,7 +100,6 @@ passphrase
 Pawel
 PBKDF
 Pelletier
-Petr
 PgBouncer
 pgcrypto
 pgjwt
@@ -148,16 +130,13 @@ Rafaj
 RDS
 reallyreallyreallyreallyverysafe
 Rechkemmer
-reconnection
 Redux
 refactor
 reloadable
 Reloadable
 Remo
 requester's
-roundtrips
 RESTful
-RestSharp
 RLS
 RPC
 RSA
@@ -166,16 +145,12 @@ safeupdate
 savepoint
 schemas
 schema's
-Sencha
-Serverless
 Severin
 SHA
 Sommer
 signup
 SIGUSR
 sl
-SNS
-sqitch
 SQL
 sql
 sr
@@ -183,14 +158,10 @@ SSL
 stateful
 stdout
 Stolarz
-subselect
-SuperAgent
 SvelteKit
 SwaggerUI
 syslog
 systemd
-Tcl
-tmuxp
 todo
 todos
 tos
@@ -212,16 +183,13 @@ uri
 url
 urls
 variadic
-Vercel
 verifier
 versioning
 Vondra
 Vue
-WAI
 webhooks
 websearch
 Websockets
 webuser
 wfts
 Zac
-ZeroMQ