diff --git a/lib/config/parameters_parser.js b/lib/config/parameters_parser.js
index 94cba3d..15b7963 100644
--- a/lib/config/parameters_parser.js
+++ b/lib/config/parameters_parser.js
@@ -2,9 +2,9 @@
  * I transform a list of console parameters into a valid configuration object.
  * I can also differentiate between path parameters and configuration parameters.
  */
-import { isFailFastParam, isLanguageParam, isRandomizeParam } from '../utils.js';
+import { I18n } from '../i18n/i18n.js';
+import { isString } from '../utils.js';
 
-const LANGUAGE_OPTIONS = ['es', 'en', 'it'];
 export class ParametersParser {
 
   static generateRunConfigurationFromParams(params) {
@@ -15,14 +15,14 @@ export class ParametersParser {
   static generateRunConfigurationFromSanitizedParams(sanitizedParams) {
     let generatedParams = {};
     sanitizedParams.forEach(param => {
-      const runParameter = this.#generateRunConfigurationParameter(param);
+      const runParameter = this.generateRunConfigurationParameter(param);
       generatedParams = { ...generatedParams, ...runParameter };
     });
 
     return generatedParams;
   }
 
-  static #generateRunConfigurationParameter(param) {
+  static generateRunConfigurationParameter(param) {
     const paramParser = [FailFastConfigurationParameterParser, RandomizeConfigurationParameterParser, LanguageConfigurationParameterParser, InvalidConfigurationParameter].find(configurationParameterParser => configurationParameterParser.canHandle(param));
     return paramParser.handle(param);
   }
@@ -30,33 +30,40 @@ export class ParametersParser {
   static sanitizeParameters(params) {
     const languageParamIndex = params.findIndex(param => param === '-l' || param === '--language');
     if (languageParamIndex >= 0) {
-      return this.#sanitizeLanguageParamOptions(params, languageParamIndex);
+      return this.sanitizeLanguageParamOptions(params, languageParamIndex);
     }
     return params;
   }
 
-  static #sanitizeLanguageParamOptions(params, languageParamIndex) {
-    const languageOption = this.#validateLanguageOption(params, languageParamIndex);
+  static sanitizeLanguageParamOptions(params, languageParamIndex) {
+    const languageOption = this.validateLanguageOption(params, languageParamIndex);
     const languageConfig = [`-l ${languageOption}`];
-    this.#removeLanguageParameters(params, languageParamIndex);
+    this.removeLanguageParameters(params, languageParamIndex);
     return [...params, ...languageConfig];
   }
 
-  static #validateLanguageOption(params, languageParamIndex) {
+  static validateLanguageOption(params, languageParamIndex) {
     const languageOption = params[languageParamIndex + 1];
-    if (!LANGUAGE_OPTIONS.includes(languageOption)) {
-      throw new Error('Invalid language option. Please choose an option between es for Spanish, en for English or it for Italian');
+    const supportedLanguages = I18n.supportedLanguages();
+    if (!supportedLanguages.includes(languageOption)) {
+      I18n.unsupportedLanguageException(languageOption, supportedLanguages);
     }
     return languageOption;
   }
 
-  static #removeLanguageParameters(params, languageParamIndex) {
+  static removeLanguageParameters(params, languageParamIndex) {
     params.splice(languageParamIndex, 2);
   }
 
   static getPathsAndConfigurationParams(allParams) {
     const firstConfigParamIndex = allParams.findIndex(param => this.isConfigurationParam(param));
+
     if (firstConfigParamIndex >= 0) {
+      const paramsAfterFirstConfigurationParam = allParams.slice(firstConfigParamIndex);
+      const thereIsPathParamAfterConfigParams = paramsAfterFirstConfigurationParam.some(param => !this.isConfigurationParam(param));
+      if (thereIsPathParamAfterConfigParams) {
+        throw new Error('Run configuration parameters should always be sent at the end of test paths routes');
+      }
       return {
         pathsParams: allParams.slice(0, firstConfigParamIndex),
         configurationParams: allParams.slice(firstConfigParamIndex),
@@ -70,14 +77,27 @@ export class ParametersParser {
   }
 
   static isConfigurationParam(param) {
-    return isFailFastParam(param) || isRandomizeParam(param) || isLanguageParam(param);
+    return this.isFailFastParam(param) || this.isRandomizeParam(param) || this.isLanguageParam(param);
+  }
+
+  static isFailFastParam(string) {
+    return isString(string) && (string === '-f' || string === '--fail-fast');
   }
+
+  static isRandomizeParam(string) {
+    return isString(string) && (string === '-r' || string === '--randomize');
+  }
+
+  static isLanguageParam(param) {
+    const options = param.split(' ');
+    return isString(options[0]) && (options[0] === '-l' || options[0] === '--language');
+  };
 }
 
 class FailFastConfigurationParameterParser {
 
   static canHandle(consoleParam) {
-    return isFailFastParam(consoleParam);
+    return ParametersParser.isFailFastParam(consoleParam);
   }
 
   static handle(_consoleParam) {
@@ -88,7 +108,7 @@ class FailFastConfigurationParameterParser {
 class RandomizeConfigurationParameterParser {
 
   static canHandle(consoleParam) {
-    return isRandomizeParam(consoleParam);
+    return ParametersParser.isRandomizeParam(consoleParam);
   }
 
   static handle(_consoleParam) {
@@ -99,7 +119,7 @@ class RandomizeConfigurationParameterParser {
 class LanguageConfigurationParameterParser {
 
   static canHandle(consoleParam) {
-    return isLanguageParam(consoleParam);
+    return ParametersParser.isLanguageParam(consoleParam);
   }
 
   static handle(consoleParam) {
diff --git a/lib/i18n/i18n.js b/lib/i18n/i18n.js
index e3825e4..07ec0c4 100644
--- a/lib/i18n/i18n.js
+++ b/lib/i18n/i18n.js
@@ -37,6 +37,10 @@ class I18n {
     return `Translation key '${key}' not found in translations for language: ${languageCode}!`;
   }
 
+  static unsupportedLanguageException(languageCode, supportedLanguages) {
+    throw new Error(`Language '${languageCode}' is not supported. Allowed values: ${supportedLanguages.join(', ')}`);
+  }
+
   constructor(languageCode, translations = TRANSLATIONS) {
     this.#assertLanguageIsSupported(languageCode, translations);
     this.#languageCode = languageCode;
@@ -55,7 +59,7 @@ class I18n {
   #assertLanguageIsSupported(languageCode, translations) {
     const supportedLanguages = I18n.supportedLanguages(translations);
     if (!supportedLanguages.includes(languageCode)) {
-      throw new Error(`Language '${languageCode}' is not supported. Allowed values: ${supportedLanguages.join(', ')}`);
+      I18n.unsupportedLanguageException(languageCode, supportedLanguages);
     }
   }
 
diff --git a/lib/utils.js b/lib/utils.js
index b27bb91..bf5125d 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -78,16 +78,6 @@ const isFunction = object =>
 const isUndefined = object =>
   typeof object === 'undefined';
 
-const isFailFastParam = string =>
-  isString(string) && (string === '-f' || string === '--fail-fast');
-
-const isRandomizeParam = string =>
-  isString(string) && (string === '-r' || string === '--randomize');
-
-const isLanguageParam = param => {
-  const options = param.split(' ');
-  return isString(options[0]) && (options[0] === '-l' || options[0] === '--language');
-};
 const notNullOrUndefined = object =>
   !isUndefined(object) && object !== null;
 
@@ -183,8 +173,4 @@ export {
   errorDetailOf,
   // metaprogramming
   detectUserCallingLocation,
-  // parsing
-  isFailFastParam,
-  isRandomizeParam,
-  isLanguageParam,
 };
diff --git a/tests/configuration/parameters_parser_test.js b/tests/configuration/parameters_parser_test.js
index acda758..447d444 100644
--- a/tests/configuration/parameters_parser_test.js
+++ b/tests/configuration/parameters_parser_test.js
@@ -1,5 +1,6 @@
 import { assert, suite, test } from '../../lib/testy.js';
 import { ParametersParser } from '../../lib/config/parameters_parser.js';
+import { I18n } from '../../lib/i18n/i18n.js';
 
 suite('Parameters parser', () => {
 
@@ -84,6 +85,13 @@ suite('Parameters parser', () => {
     assert.areEqual(configurationParams, []);
   });
 
+  test('throws an error when file path params are sent after configuration parameters', () => {
+    const testPath1 = 'I am a test path';
+    assert
+      .that(() => ParametersParser.getPathsAndConfigurationParams(['-f', testPath1]))
+      .raises(new Error('Run configuration parameters should always be sent at the end of test paths routes'));
+  });
+
   test('returns sanitized params when passing a valid list of params', () => {
     const sanitizedParams = ParametersParser.sanitizeParameters(['-f', '-r']);
     assert.areEqual(sanitizedParams, ['-f', '-r']);
@@ -97,12 +105,12 @@ suite('Parameters parser', () => {
   test('throws an error when sending invalid language option', () => {
     assert
       .that(() => ParametersParser.sanitizeParameters(['-l', 'fakeLanguage']))
-      .raises(new Error('Invalid language option. Please choose an option between es for Spanish, en for English or it for Italian'));
+      .raises(new Error(`Language '${'fakeLanguage'}' is not supported. Allowed values: ${I18n.supportedLanguages().join(', ')}`));
   });
 
   test('throws an error when language parameters do not have the proper order', () => {
     assert
       .that(() => ParametersParser.sanitizeParameters(['it', '-l']))
-      .raises(new Error('Invalid language option. Please choose an option between es for Spanish, en for English or it for Italian'));
+      .raises(new Error(`Language '${undefined}' is not supported. Allowed values: ${I18n.supportedLanguages().join(', ')}`));
   });
 });
diff --git a/tests/core/configuration_test.js b/tests/core/configuration_test.js
index a14b728..8242f9a 100644
--- a/tests/core/configuration_test.js
+++ b/tests/core/configuration_test.js
@@ -54,7 +54,7 @@ suite('Configuration parameters', () => {
   });
 
   test('can send a configuration and values not present will default to default configuration', () => {
-    const userCustomizedConfiguration = Configuration.withConfiguration({language: "es", failFast: true});
+    const userCustomizedConfiguration = Configuration.withConfiguration({ language: 'es', failFast: true });
     assert.areEqual(userCustomizedConfiguration.language(), 'es');
     assert.areEqual(userCustomizedConfiguration.failFastMode(), FailFast.default());
   });