diff --git a/frontend/messages/de.json b/frontend/messages/de.json
index 1315a8c7..5ea1b00a 100644
--- a/frontend/messages/de.json
+++ b/frontend/messages/de.json
@@ -42,6 +42,7 @@
 	"search_chip_sender": "Absender",
 	"search_chip_date": "Zeitraum",
 	"search_chip_keyword": "Stichwort",
+	"search_chip_theme_prefix": "Thema",
 	"search_chip_directional_label": "Von {from} zu {to}, Filter entfernen",
 	"search_disambiguation_trigger_label": "Mehrere Personen gefunden — zum Auswählen klicken",
 	"search_disambiguation_cue": "(auswählen…)",
diff --git a/frontend/messages/en.json b/frontend/messages/en.json
index a1315bdc..be3af0ce 100644
--- a/frontend/messages/en.json
+++ b/frontend/messages/en.json
@@ -42,6 +42,7 @@
 	"search_chip_sender": "Sender",
 	"search_chip_date": "Period",
 	"search_chip_keyword": "Keyword",
+	"search_chip_theme_prefix": "Topic",
 	"search_chip_directional_label": "From {from} to {to}, remove filter",
 	"search_disambiguation_trigger_label": "Several people found — click to choose",
 	"search_disambiguation_cue": "(choose…)",
diff --git a/frontend/messages/es.json b/frontend/messages/es.json
index 86f2c52e..c5fb2fc8 100644
--- a/frontend/messages/es.json
+++ b/frontend/messages/es.json
@@ -42,6 +42,7 @@
 	"search_chip_sender": "Remitente",
 	"search_chip_date": "Período",
 	"search_chip_keyword": "Palabra clave",
+	"search_chip_theme_prefix": "Tema",
 	"search_chip_directional_label": "De {from} a {to}, eliminar filtro",
 	"search_disambiguation_trigger_label": "Se encontraron varias personas — haga clic para elegir",
 	"search_disambiguation_cue": "(elegir…)",