diff --git a/src/controllers/crm-email.controller.js b/src/controllers/crm-email.controller.js
index a28185b..c5a6ddf 100644
--- a/src/controllers/crm-email.controller.js
+++ b/src/controllers/crm-email.controller.js
@@ -105,7 +105,7 @@ export const getUnreadCount = async (req, res, next) => {
       },
     });
   } catch (error) {
-    logger.error('ERROR in getUnreadCount', { error: error.message });
+    logger.error('Chyba v getUnreadCount', { error: error.message });
     next(error);
   }
 };
@@ -165,7 +165,7 @@ export const syncEmails = async (req, res, next) => {
         totalSynced += total;
         totalNew += saved;
       } catch (syncError) {
-        logger.error('Failed to sync emails for contact', { contactEmail: contact.email, error: syncError.message });
+        logger.error('Nepodarilo sa synchronizovať emaily pre kontakt', { contactEmail: contact.email, error: syncError.message });
       }
     }
 
@@ -261,7 +261,7 @@ export const markContactEmailsRead = async (req, res, next) => {
       data: { count },
     });
   } catch (error) {
-    logger.error('ERROR in markContactEmailsRead', { error: error.message });
+    logger.error('Chyba v markContactEmailsRead', { error: error.message });
     next(error);
   }
 };
@@ -444,7 +444,7 @@ export const searchEmailsJMAP = async (req, res, next) => {
       data: results,
     });
   } catch (error) {
-    logger.error('ERROR in searchEmailsJMAP', { error: error.message });
+    logger.error('Chyba v searchEmailsJMAP', { error: error.message });
     next(error);
   }
 };
diff --git a/src/middlewares/global/errorHandler.js b/src/middlewares/global/errorHandler.js
index efc3924..a86143b 100644
--- a/src/middlewares/global/errorHandler.js
+++ b/src/middlewares/global/errorHandler.js
@@ -7,7 +7,7 @@ export function errorHandler(err, req, res, next) {
   }
 
   // Log error
-  logger.error('Unhandled error', err);
+  logger.error('Neošetrená chyba', err);
 
   // Get status code
   const statusCode = typeof err.statusCode === 'number'
diff --git a/src/middlewares/global/validateBody.js b/src/middlewares/global/validateBody.js
index 619b3d6..9ce8ee2 100644
--- a/src/middlewares/global/validateBody.js
+++ b/src/middlewares/global/validateBody.js
@@ -12,7 +12,7 @@ export function validateBody(req, res, next) {
   ];
   for (const pattern of dangerousPatterns) {
     if (pattern.test(data)) {
-      logger.warn('Suspicious input detected', { data: data.substring(0, 100) });
+      logger.warn('Detegovaný podozrivý vstup', { data: data.substring(0, 100) });
       return res.status(400).json({ message: 'Detegovaný škodlivý obsah v požiadavke' });
     }
   }
diff --git a/src/middlewares/security/validateInput.js b/src/middlewares/security/validateInput.js
index ff5ed8d..fe94a20 100644
--- a/src/middlewares/security/validateInput.js
+++ b/src/middlewares/security/validateInput.js
@@ -35,7 +35,7 @@ export const validateBody = (schema) => {
       }
 
       // Log unexpected errors
-      logger.error('Validation error', { error: error.message });
+      logger.error('Chyba validácie', { error: error.message });
 
       return res.status(400).json({
         success: false,
@@ -75,7 +75,7 @@ export const validateQuery = (schema) => {
         });
       }
 
-      logger.error('Query validation error', { error: error.message });
+      logger.error('Chyba validácie query parametrov', { error: error.message });
 
       return res.status(400).json({
         success: false,
@@ -115,7 +115,7 @@ export const validateParams = (schema) => {
         });
       }
 
-      logger.error('Params validation error', { error: error.message });
+      logger.error('Chyba validácie URL parametrov', { error: error.message });
 
       return res.status(400).json({
         success: false,