How to convert params file to i18n in yii2 - yii2

Question

I try to convert params.php string to i18n in yii2, But, it's can't convert.
And another all string are converted sucessfully.
Here is my file.
params.php
<?php
return [
'bsVersion' => '4.x',
'bsDependencyEnabled' => false,
'adminEmail' => 'admin#example.com',
'unauthorized_error'=>'You are not access this action.',
'status_change_success'=>'Records status has been changed..',
'records_save_success'=> Yii::t('params', 'Records save has been success..'),
'status_change_error'=>'Records status not changed..',
'records_delete_success'=>'Records has been deleted..',
'records_delete_error'=>'Records not deleted..',
'records_not_found'=>'Data not found..',
'execution_error' => 'Oops!!! There was some problem while executing your request. Try again later.',
'reset_password_request' => 'Your password reset link has been sent you in your email , please check your email inbox or spam folder',
'password_change_success'=>'Passwod change successfully!!',
'password_wrong' => 'Your password is wrong!',
'inactive_user' => 'You have inactive user. Please contact to website admin',
'not_registered_user' => 'You have not registered. Please register first then login',
'enter_user_pass' => 'Enter username and password!',
'something_wrong' => 'Something went wrong!',
'server_error' => 'Server error',
'student_not_found' => 'Student not found.',
'teacher_not_found' => 'Teachers not found.',
'validation_error' => 'Validation Error.',
'comment_success' => 'Your Comment send successfully!.',
'attendance_save_success' => 'Attendance save successfully!.',
'homework_save_success' => 'Homework save successfully!.',
'register_successfully' => 'User registered successfully!',
'photo_gallery_path' =>'uploads/photo_gallery/',
'appointment_status_change' =>'Appointments status has been changed!',
'leave_application_status_change'=>'Leave application status changed..',
'timetable_import_success' => 'Your timetable import successfully',
'group_type' =>[
"7" => "Hostel Rector",
"8" => "Security"
],
'day' => [
'1' => Yii::t('params', 'Monday'),
'2' => Yii::t('params', 'Tuesday'),
'3' => Yii::t('params', 'Wednesday'),
'4' => Yii::t('params', 'Thursday'),
'5' => Yii::t('params', 'Friday'),
'6' => Yii::t('params', 'Saturday'),
// '7' => 'Sunday',
],
....
'syllabus_status' =>[
'1' => Yii::t('params', 'Running'),
'2' => Yii::t('params', 'Finish'),
],
'news_event' =>[
'1' => Yii::t('params', 'News'),
'2' => Yii::t('params', 'Event'),
],
'exam_type' => [
'1' => Yii::t('params', 'Weekly'),
'2' => Yii::t('params', 'Monthly'),
'3' => Yii::t('params', 'Yearly'),
],
'lang_list' => [
'1' => Yii::t('params', 'English'),
'2' => Yii::t('params', 'Gujarati'),
]
];

Answer 1

You cannot use Yii::t() for translating params directly in config file - this file is used before application is initialized, so at this point Yii is not able to detect current language and i18n is not yet initialized. The easiest way is to postpone translation - put untranslated strings in params:
'lang_list' => [
'1' => 'English',
'2' => 'Gujarati',
]
And translate when you need it:
echo Yii::t('param', Yii::$app->params['lang_list']['1']);
Alternatively you may use beforeRequest event to generate params after app initialization:
'on beforeRequest' => function ($event) {
Yii::$app->params += [
'syllabus_status' => [
'1' => Yii::t('params', 'Running'),
'2' => Yii::t('params', 'Finish'),
],
'news_event' => [
'1' => Yii::t('params', 'News'),
'2' => Yii::t('params', 'Event'),
],
'exam_type' => [
'1' => Yii::t('params', 'Weekly'),
'2' => Yii::t('params', 'Monthly'),
'3' => Yii::t('params', 'Yearly'),
],
'lang_list' => [
'1' => Yii::t('params', 'English'),
'2' => Yii::t('params', 'Gujarati'),
],
];
},