-// error strings
-// Note to translators: the strings below must be translated
-// 'error.db' => 'database error',
-// 'error.field' => 'incorrect "{0}" data',
-// 'error.empty' => 'field "{0}" is empty',
-// 'error.not_equal' => 'field "{0}" is not equaled to field "{1}"',
-// 'error.interval' => 'incorrect interval',
-// 'error.project' => 'select project',
-// 'error.activity' => 'select activity',
-// 'error.auth' => 'incorrect login or password',
-// 'error.user_exists' => 'user with this login already exists',
-// 'error.project_exists' => 'project with this name already exists',
-// 'error.activity_exists' => 'activity with this name already exists',
-// 'error.client_exists' => 'client with this name already exists',
-// 'error.no_login' => 'no user with this e-mail',
-// 'error.upload' => 'file upload error',
-// 'error.period_locked' => 'can\\\'t complete the operation. records older than a certain number of days cannot be created or modified. team manager defines this in the "Lock interval in days" value on the "Profile" page. set it to 0 to remove locking. <br><br>uncompleted records (with 0 or empty duration) can be deleted.',
-// 'error.mail_send' => 'error sending mail',
-// 'error.no_email' => 'no email associated with this login',
-// 'error.uncompleted_exists' => 'uncompleted entry already exists. close or delete it.',
-// 'error.goto_uncompleted' => 'go to uncompleted entry.',
-
-// labels for various buttons
-'button.login' => 'login',
-'button.now' => 'hoje',
-// 'button.set' => 'set',
-'button.save' => 'salvar',
-'button.delete' => 'apagar',
-'button.cancel' => 'cancelar',
-'button.submit' => 'submeter',
-// Note to translators: 'button.add_user' => 'add user', // the string must be translated
-'button.add_project' => 'adicionar projeto',
-'button.add_activity' => 'adicionar atividade',
-// 'button.add_client' => 'add client', // TODO: translate this.
-'button.add' => 'adicionar',
-// Note to translators: strings below need to be translated.
-// 'button.generate' => 'generate',
-// 'button.reset_password' => 'reset password',
-'button.send' => 'enviar',
-'button.send_by_email' => 'enviar por e-mail',
-// Note to translators: the strings below are missing and must be added and translated
-// 'button.save_as_new' => 'save as new',
-// 'button.create_team' => 'create team',
-// 'button.export' => 'export team',
-// 'button.import' => 'import team',
-// 'button.apply' => 'apply',
+// Footer - strings on the bottom of most pages.
+// TODO: translate the following.
+// 'footer.contribute_msg' => 'You can contribute to Time Tracker in different ways.',
+// 'footer.credits' => 'Credits',
+// 'footer.license' => 'License',
+// 'footer.improve' => 'Contribute', // Translators: this could mean "Improve", if it makes better sense in your language.
+ // This is a link to a webpage that describes how to contribute to the project.
+
+// Error messages.
+// TODO: translate the following.
+// 'error.access_denied' => 'Access denied.',
+// 'error.sys' => 'System error.',
+// 'error.db' => 'Database error.',
+// 'error.field' => 'Incorrect "{0}" data.',
+// 'error.empty' => 'Field "{0}" is empty.',
+// 'error.not_equal' => 'Field "{0}" is not equal to field "{1}".',
+// 'error.interval' => 'Field "{0}" must be greater than "{1}".',
+// 'error.project' => 'Select project.',
+// 'error.task' => 'Select task.',
+// 'error.client' => 'Select client.',
+// 'error.report' => 'Select report.',
+// 'error.record' => 'Select record.',
+// 'error.auth' => 'Incorrect login or password.',
+// 'error.user_exists' => 'User with this login already exists.',
+// 'error.project_exists' => 'Project with this name already exists.',
+// 'error.task_exists' => 'Task with this name already exists.',
+// 'error.client_exists' => 'Client with this name already exists.',
+// 'error.invoice_exists' => 'Invoice with this number already exists.',
+// 'error.no_invoiceable_items' => 'There are no invoiceable items.',
+// 'error.no_login' => 'No user with this login.',
+// 'error.no_teams' => 'Your database is empty. Login as admin and create a new team.',
+// 'error.upload' => 'File upload error.',
+// 'error.range_locked' => 'Date range is locked.',
+// 'error.mail_send' => 'Error sending mail.',
+// 'error.no_email' => 'No email associated with this login.',
+// 'error.uncompleted_exists' => 'Uncompleted entry already exists. Close or delete it.',
+// 'error.goto_uncompleted' => 'Go to uncompleted entry.',
+// 'error.overlap' => 'Time interval overlaps with existing records.',
+// 'error.future_date' => 'Date is in future.',
+
+// Labels for buttons.
+'button.login' => 'Login',
+'button.now' => 'Hoje',
+'button.save' => 'Salvar',
+// TODO: translate the following.
+// 'button.copy' => 'Copy',
+'button.cancel' => 'Cancelar',
+'button.submit' => 'Submeter',
+// TODO: translate the following.
+// 'button.add_user' => 'Add user',
+'button.add_project' => 'Adicionar projeto',
+// TODO: translate the following.
+// 'button.add_task' => 'Add task',
+// 'button.add_client' => 'Add client',
+// 'button.add_invoice' => 'Add invoice',
+// 'button.add_option' => 'Add option',
+'button.add' => 'Adicionar',
+// TODO: translate the following.
+// 'button.generate' => 'Generate',
+// 'button.reset_password' => 'Reset password',
+'button.send' => 'Enviar',
+'button.send_by_email' => 'Enviar por e-mail',
+// TODO: translate the following.
+// 'button.create_team' => 'Create team',
+// 'button.export' => 'Export team',
+// 'button.import' => 'Import team',
+// 'button.close' => 'Close',
+// 'button.stop' => 'Stop',
+
+
+
+// TODO: refactoring ongoing down from here.