diff --git a/ai.finto.fi/index.html b/ai.finto.fi/index.html
index f5b1dbd..b98cf9b 100644
--- a/ai.finto.fi/index.html
+++ b/ai.finto.fi/index.html
@@ -163,7 +163,7 @@ <h3>{{ $t('suggestions_label') }}</h3>
 
           <project-select v-model="selected_project" :projects="projects"></project-select>
           <limit-input v-model="limit"></limit-input><br>
-          <language-select v-model="language"></language-select>
+          <language-select v-model="language" :selected-project="selected_project"></language-select>
 
           <div class="d-grid justify-content-end">
             <button id="get-suggestions" type="button" class="btn btn-primary"
diff --git a/ai.finto.fi/static/js/annif.js b/ai.finto.fi/static/js/annif.js
index bfd48f8..e3866bb 100644
--- a/ai.finto.fi/static/js/annif.js
+++ b/ai.finto.fi/static/js/annif.js
@@ -356,6 +356,7 @@ mainApp.component('project-select', {
       },
       computed: {
         vocabularyId() {
+          // TODO: This is a hack. We should expose the vocabulary id from Annif API.
           // Assume vocabulary id is a prefix of project id
           if (this.selectedProject && this.selectedProject.project_id) {
             // Assume vocabulary id is a prefix of project id
@@ -435,23 +436,44 @@ mainApp.component('limit-input', {
 })
 
 mainApp.component('language-select', {
-  props: ['modelValue'], // modelValue: selected language
+  props: ['modelValue', 'selectedProject'],
   emits: ['update:modelValue'],
+  computed: {
+    vocabularyId() {
+      // TODO: This is a hack. We should expose the vocabulary id from Annif API.
+      // Why project is here the project_id string?
+      // Assume vocabulary id is a prefix
+      if (this.selectedProject) {
+        return this.selectedProject.split("-")[0];
+      }
+      return '';
+    },
+    disabledLanguages() {
+      // Map of languages and their enabling criteria based on vocabularyId
+      return {
+        se: this.vocabularyId !== 'yso', // 'se' enabled only if vocabularyId is 'yso'
+      };
+    }
+  },
+  methods: {
+    isOptionDisabled(language) {
+      return this.disabledLanguages[language] || false; // Default to false if not specified in map
+    }
+  },
   template: `
     <label class="suggest-form-label form-label" for="label-language">{{ $t('language_select_label') }}</label>
     <div class="select-wrapper">
-      <select class="form-control" id="label-language"
-        :value="modelValue"
-        @change="$emit('update:modelValue', $event.target.value)"
-      >
+      <select class="form-control" id="label-language" :value="modelValue"
+        @change="$emit('update:modelValue', $event.target.value)">
         <option value="project-language">{{ $t('language_select_project') }}</option>
         <option value="fi">{{ $t('language_select_fi') }}</option>
         <option value="sv">{{ $t('language_select_sv') }}</option>
         <option value="en">{{ $t('language_select_en') }}</option>
+        <option :disabled="isOptionDisabled('se')" value="se">{{ $t('language_select_sm') }}</option>
       </select>
     </div>
   `
-})
+});
 
 mainApp.component('result-list', {
   props: ['results', 'language', 'selected_project', 'projects'],
diff --git a/ai.finto.fi/static/js/i18n.js b/ai.finto.fi/static/js/i18n.js
index 751c973..17c4cc6 100644
--- a/ai.finto.fi/static/js/i18n.js
+++ b/ai.finto.fi/static/js/i18n.js
@@ -45,6 +45,7 @@ const messages = {
     language_select_fi: "suomi",
     language_select_sv: "ruotsi",
     language_select_en: "englanti",
+    language_select_sm: "pohjoissaame",
     get_suggestions: "Anna aihe-ehdotukset",
     suggestions_heading: "Ehdotukset",
     copy_heading: "Kopioi",
@@ -126,6 +127,7 @@ const messages = {
     language_select_fi: "Finnish",
     language_select_sv: "Swedish",
     language_select_en: "English",
+    language_select_sm: "Northern Sami",
     get_suggestions: "Get subject suggestions",
     suggestions_heading: "Suggestions",
     copy_heading: "Copy",
@@ -207,6 +209,7 @@ const messages = {
     language_select_fi: "finska",
     language_select_sv: "svenska",
     language_select_en: "engelska",
+    language_select_sm: "nordsamiska",
     get_suggestions: "Ge förslag till ämnesord",
     suggestions_heading: "Förslag",
     copy_heading: "kopiera",