fix: setLanguage and icon issue for the iOS SDK (#5470)

packages/ios/FormbricksSDK/FormbricksSDK/Manager/SurveyManager.swift

@@ -62,7 +62,19 @@ final class SurveyManager {
                 
         // Display percentage
         let shouldDisplay = shouldDisplayBasedOnPercentage(firstSurveyWithActionClass?.displayPercentage)
-                
+        let isMultiLangSurvey = firstSurveyWithActionClass?.languages?.count ?? 0 > 1
+
+        if isMultiLangSurvey {
+            guard let survey = firstSurveyWithActionClass else {return}
+            let currentLanguage = Formbricks.language
+            guard let languageCode = getLanguageCode(survey: survey, language: currentLanguage) else {
+                Formbricks.logger?.error("Survey \(survey.name) is not available in language “\(currentLanguage)”. Skipping.")
+                return
+            }
+            
+            Formbricks.language = languageCode
+        }
+
         // Display and delay it if needed
         if let surveyId = firstSurveyWithActionClass?.id, shouldDisplay {
             isShowingSurvey = true
@@ -234,6 +246,47 @@ private extension SurveyManager {
         }
     }
     
+    func getLanguageCode(
+        survey: Survey,
+        language: String?
+    ) -> String? {
+        // 1) Collect all codes
+        let availableLanguageCodes = survey.languages?
+            .map { $0.language.code }
+        
+        // 2) If no language was passed or it's the explicit "default" token → default
+        guard let raw = language?.lowercased(), !raw.isEmpty else {
+            return "default"
+        }
+        
+        if raw == "default" {
+            return "default"
+        }
+    
+        // 3) Find matching entry by code or alias
+        let selected = survey.languages?.first { entry in
+            entry.language.code.lowercased() == raw ||
+            entry.language.alias?.lowercased() == raw
+        }
+        
+        // 4) If that entry is marked default → default
+        if selected?.isDefault == true {
+            return "default"
+        }
+        
+        // 5) If no entry, or not enabled, or code not in the available list → nil
+        guard
+            let entry = selected,
+            entry.enabled,
+            availableLanguageCodes?.contains(entry.language.code) == true
+        else {
+            return nil
+        }
+        
+        // 6) Otherwise return its code
+        return entry.language.code
+    }
+    
     /// Filters the surveys based on the user's segments.
     func filterSurveysBasedOnSegments(_ surveys: [Survey], segments: [String]) -> [Survey] {
         return surveys.filter { survey in

packages/ios/FormbricksSDK/FormbricksSDK/Model/Environment/Survey.swift

@@ -5,6 +5,25 @@ enum DisplayOptionType: String, Codable {
     case displaySome = "displaySome"
 }
 
+struct SurveyLanguage: Codable {
+    let enabled: Bool
+    let isDefault: Bool       // must differ from "default" in JSON
+    let language: LanguageDetail
+
+    private enum CodingKeys: String, CodingKey {
+        case enabled
+        case isDefault = "default"
+        case language
+    }
+}
+
+struct LanguageDetail: Codable {
+    let id: String
+    let code: String
+    let alias: String?
+    let projectId: String
+}
+
 struct Survey: Codable {
     let id: String
     let name: String
@@ -16,5 +35,5 @@ struct Survey: Codable {
     let displayOption: DisplayOptionType?
     let segment: Segment?
     let styling: Styling?
+    let languages: [SurveyLanguage]?
 }
-

packages/ios/FormbricksSDK/FormbricksSDK/WebView/FormbricksViewModel.swift

@@ -86,12 +86,19 @@ private class WebViewData {
     init(environmentResponse: EnvironmentResponse, surveyId: String) {
         data["survey"] = environmentResponse.getSurveyJson(forSurveyId: surveyId)
         data["isBrandingEnabled"] = true
-        data["languageCode"] = Formbricks.language
         data["appUrl"] = Formbricks.appUrl
         data["environmentId"] = Formbricks.environmentId
         data["contactId"] = Formbricks.userManager?.contactId
         data["isWebEnvironment"] = false
         
+        let isMultiLangSurvey = environmentResponse.data.data.surveys?.first(where: { $0.id == surveyId })?.languages?.count ?? 0 > 1
+        
+        if isMultiLangSurvey {
+            data["languageCode"] = Formbricks.language
+        } else {
+            data["languageCode"] = "default"
+        }
+        
         let hasCustomStyling = environmentResponse.data.data.surveys?.first(where: { $0.id == surveyId })?.styling != nil
         let enabled = environmentResponse.data.data.project.styling?.allowStyleOverwrite ?? false
             

packages/surveys/src/components/general/survey-close-button.tsx

@@ -10,7 +10,7 @@ export function SurveyCloseButton({ onClose }: SurveyCloseButtonProps) {
         onClick={onClose}
         className="fb-text-heading fb-relative fb-h-5 fb-w-5 fb-rounded-md hover:fb-bg-black/5 focus:fb-outline-none focus:fb-ring-2 focus:fb-ring-offset-2">
         <svg
-          className="fb-h-5 fb-w-5 fb-p-0.5"
+          className="fb-h-6 fb-w-6 fb-p-0.5"
           fill="none"
           viewBox="0 0 24 24"
           strokeWidth="1"