diff --git a/addons/hr_timesheet/models/project.py b/addons/hr_timesheet/models/project.py
index e93a3c5deac..f82c68fbda8 100644
--- a/addons/hr_timesheet/models/project.py
+++ b/addons/hr_timesheet/models/project.py
@@ -8,10 +8,10 @@ from odoo.exceptions import UserError, ValidationError
 class Project(models.Model):
     _inherit = "project.project"
 
-    allow_timesheets = fields.Boolean("Allow timesheets", default=True)
+    allow_timesheets = fields.Boolean("Allow timesheets", default=True, help="Enable timesheeting on the project.")
     analytic_account_id = fields.Many2one('account.analytic.account', string="Analytic Account", copy=False, ondelete='set null',
-        help="Link this project to an analytic account if you need financial management on projects. "
-             "It enables you to connect projects with budgets, planning, cost and revenue analysis, timesheets on projects, etc.")
+        help="Analytic account to which this project is linked for financial management."
+             "Use an analytic account to record cost and revenue on your project.")
 
     @api.onchange('partner_id')
     def _onchange_partner_id(self):
diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index b3286c2afe3..dc1044defce 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -185,9 +185,8 @@ class Project(models.Model):
         default=_get_default_favorite_user_ids,
         string='Members')
     is_favorite = fields.Boolean(compute='_compute_is_favorite', inverse='_inverse_is_favorite', string='Show Project on dashboard',
-        help="Whether this project should be displayed on the dashboard or not")
-    label_tasks = fields.Char(string='Use Tasks as', default=lambda s: _('Tasks'), translate=True,
-        help="Gives label to tasks on project's kanban view.")
+        help="Whether this project should be displayed on your dashboard.")
+    label_tasks = fields.Char(string='Use Tasks as', default='Tasks', help="Label used for the tasks of the project.")
     tasks = fields.One2many('project.task', 'project_id', string="Task Activities")
     resource_calendar_id = fields.Many2one(
         'resource.calendar', string='Working Time',
@@ -209,27 +208,26 @@ class Project(models.Model):
         ],
         string='Privacy', required=True,
         default='portal',
-        help="Holds visibility of the tasks or issues that belong to the current project:\n"
-                "- On invitation only: Employees may only see the followed project, tasks or issues\n"
-                "- Visible by all employees: Employees may see all project, tasks or issues\n"
-                "- Visible by following customers: employees see everything;\n"
-                "   if website is activated, portal users may see project, tasks or issues followed by\n"
-                "   them or by someone of their company\n")
+        help="Defines the visibility of the tasks of the project:\n"
+                "- On invitation only: employees may only see the followed project and tasks.\n"
+                "- Visible by all employees: employees may see all project and tasks.\n"
+                "- Visible by following customers: employees may see everything."
+                "   if website is activated, portal users may see project and tasks followed by.\n"
+                "   them or by someone of their company.")
     doc_count = fields.Integer(compute='_compute_attached_docs_count', string="Number of documents attached")
     date_start = fields.Date(string='Start Date')
     date = fields.Date(string='Expiration Date', index=True, track_visibility='onchange')
     subtask_project_id = fields.Many2one('project.project', string='Sub-task Project', ondelete="restrict",
-        help="Choosing a sub-tasks project will both enable sub-tasks and set their default project (possibly the project itself)")
+        help="Project in which sub-tasks of the current project will be created. It can be the current project itself.")
 
     # rating fields
     percentage_satisfaction_task = fields.Integer(
-        compute='_compute_percentage_satisfaction_task', string="Happy % on Task", store=True, default=-1)
-    percentage_satisfaction_project = fields.Integer(
-        compute="_compute_percentage_satisfaction_project", string="Happy % on Project", store=True, default=-1)
+        compute='_compute_percentage_satisfaction_task', string="Happy % on Task", help="Satisfaction rate on task.", store=True, default=-1)
+    percentage_satisfaction_project = fields.Integer(compute="_compute_percentage_satisfaction_project", string="Happy % on Project", help="Satisfaction rate on project.", store=True, default=-1)
     rating_request_deadline = fields.Datetime(compute='_compute_rating_request_deadline', store=True)
-    rating_status = fields.Selection([('stage', 'Rating when changing stage'), ('periodic', 'Periodical Rating'), ('no','No rating')], 'Customer(s) Ratings', help="How to get the customer's feedbacks?\n"
-                    "- Rating when changing stage: Email will be sent when a task/issue is pulled in another stage\n"
-                    "- Periodical Rating: Email will be sent periodically\n\n"
+    rating_status = fields.Selection([('stage', 'Rating when changing stage'), ('periodic', 'Periodical Rating'), ('no','No rating')], 'Customer(s) Ratings', help="How to get customer feedback?\n"
+                    "- Rating when changing stage: an email will be sent when a task is pulled in another stage.\n"
+                    "- Periodical Rating: email will be sent periodically.\n\n"
                     "Don't forget to set up the mail templates on the stages for which you want to get the customer's feedbacks.", default="no", required=True)
     rating_status_period = fields.Selection([
         ('daily', 'Daily'), ('weekly', 'Weekly'), ('bimonthly', 'Twice a Month'),
diff --git a/addons/sale_timesheet/models/project.py b/addons/sale_timesheet/models/project.py
index f2e7a7ee275..aa2b573f8d0 100644
--- a/addons/sale_timesheet/models/project.py
+++ b/addons/sale_timesheet/models/project.py
@@ -8,18 +8,23 @@ from odoo.exceptions import ValidationError
 class Project(models.Model):
     _inherit = 'project.project'
 
-    sale_line_id = fields.Many2one('sale.order.line', 'Sales Order Item', domain="[('is_expense', '=', False), ('order_id', '=', sale_order_id), ('state', 'in', ['sale', 'done'])]", copy=False, help="Sale order line from which the project has been created. Used for tracability.")
-    sale_order_id = fields.Many2one('sale.order', 'Sales Order', domain="[('partner_id', '=', partner_id)]", readonly=True, copy=False)
+    sale_line_id = fields.Many2one('sale.order.line', 'Sales Order Item', domain="[('is_expense', '=', False), ('order_id', '=', sale_order_id), ('state', 'in', ['sale', 'done'])]", copy=False,
+        help="Sales order item to which the project is linked. If an employee timesheets on a task that does not have a "
+        "sale order item defines, and if this employee is not in the 'Employee/Sales Order Item Mapping' of the project, "
+        "the timesheet entry will be linked to the sales order item defined on the project.")
+    sale_order_id = fields.Many2one('sale.order', 'Sales Order', domain="[('partner_id', '=', partner_id)]", readonly=True, copy=False, help="Sales order to which the project is linked.")
     billable_type = fields.Selection([
         ('task_rate', 'At Task Rate'),
         ('employee_rate', 'At Employee Rate'),
         ('no', 'No Billable')
     ], string="Billable Type", compute='_compute_billable_type', compute_sudo=True, store=True,
-        help='Billable type implies:\n'
+        help='At which rate timesheets will be billed:\n'
         ' - At task rate: each time spend on a task is billed at task rate.\n'
         ' - At employee rate: each employee log time billed at his rate.\n'
         ' - No Billable: track time without invoicing it')
-    sale_line_employee_ids = fields.One2many('project.sale.line.employee.map', 'project_id', "Sale line/Employee map", copy=False)
+    sale_line_employee_ids = fields.One2many('project.sale.line.employee.map', 'project_id', "Sale line/Employee map", copy=False,
+        help="Employee/Sale Order Item Mapping:\n Defines to which sales order item an employee's timesheet entry will be linked."
+        "By extension, it defines the rate at which an employee's time on the project is billed.")
 
     _sql_constraints = [
         ('sale_order_required_if_sale_line', "CHECK((sale_line_id IS NOT NULL AND sale_order_id IS NOT NULL) OR (sale_line_id IS NULL))", 'The Project should be linked to a Sale Order to select an Sale Order Items.'),
@@ -142,8 +147,11 @@ class ProjectTask(models.Model):
                 sale_line_id = project.sale_line_id.id
         return sale_line_id
 
-    sale_line_id = fields.Many2one('sale.order.line', 'Sales Order Item', default=_default_sale_line_id, domain="[('is_service', '=', True), ('order_partner_id', '=', partner_id), ('is_expense', '=', False), ('state', 'in', ['sale', 'done'])]")
-    sale_order_id = fields.Many2one('sale.order', 'Sales Order', compute='_compute_sale_order_id', compute_sudo=True, store=True, readonly=True)
+    sale_line_id = fields.Many2one('sale.order.line', 'Sales Order Item', default=_default_sale_line_id, domain="[('is_service', '=', True), ('order_partner_id', '=', partner_id), ('is_expense', '=', False), ('state', 'in', ['sale', 'done'])]",
+        help="Sales order item to which the task is linked. If an employee timesheets on a this task, "
+        "and if this employee is not in the 'Employee/Sales Order Item Mapping' of the project, the "
+        "timesheet entry will be linked to this sales order item.")
+    sale_order_id = fields.Many2one('sale.order', 'Sales Order', compute='_compute_sale_order_id', compute_sudo=True, store=True, readonly=True, help="Sales order to which the task is linked.")
     billable_type = fields.Selection([
         ('task_rate', 'At Task Rate'),
         ('employee_rate', 'At Employee Rate'),