diff --git a/assets/title/cr.png b/assets/title/cr.png
new file mode 100644
index 0000000..f0ed55a
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diff --git a/assets/title/cz.png b/assets/title/cz.png
new file mode 100644
index 0000000..e56f9cb
Binary files /dev/null and b/assets/title/cz.png differ
diff --git a/assets/title/es.png b/assets/title/es.png
new file mode 100644
index 0000000..b6b0e96
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diff --git a/assets/title/pt.png b/assets/title/pt.png
new file mode 100644
index 0000000..d6577ea
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diff --git a/src/i18n.js b/src/i18n.js
index 93bb860..5c0958c 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -1,5 +1,5 @@
 const messages = require('./messages.json');
-const languages = ['en', 'de', 'it', 'gr', 'ro'];
+const languages = ['en', 'de', 'it', 'gr', 'ro', 'ee', 'cz', 'pt', 'es'];
 
 const getString = (lang, key) => {
   if (!(key in messages[lang])) console.error(`untranslated key in lang ${lang}: ${key}`);
diff --git a/src/messages.json b/src/messages.json
index 7d0716c..b9909f7 100644
--- a/src/messages.json
+++ b/src/messages.json
@@ -187,7 +187,7 @@
     "start-cta": "Pulsa comenzar cuando estés listo.",
     "start-error": "Unable to get camera access. The camera permission is required to use this app.",
     "calibration-intro": "Alinea el siguiente diagrama con la versión en color en el póster y luego pulsa Calibrar.",
-    "calibration-button": "calibrate",
+    "calibration-button": "calibrar",
     "credits-developed": "Desarrollado por",
     "credits-designed": "Diseñado en",
     "credits-back": "Volver"