If you call this with argument "unused=true" it searches for the translation strings that exist in en_US but are never used.
IMPORTANT: that can take quite a lot of time (up to 10 minutes), you need to tune the max_execution_time on your php.ini accordingly.

Duplicate strings in lang files in /home/libellules/public_html/gestion/mariong/dev/translation/../../htdocs/langs/en_US/ - 101 found

#StringFile and lines
1ShowAccountingJournalaccountancy.lang (99 - Show accounting journal) (314 - Show accounting journal)
27IfYouUseASecondTaxYouMustSetYouUseTheMainTaxadmin.lang (2207 - If you want to use a second tax, you must enable also the first sales tax) (2211 - If you want to use a second tax, you must enable also the first sales tax)
28IfYouUseAThirdTaxYouMustSetYouUseTheMainTaxadmin.lang (2208 - If you want to use a third tax, you must enable also the first sales tax) (2212 - If you want to use a third tax, you must enable also the first sales tax)
33NewAssetTypeassets.lang (24 - New asset type) (65 - New asset type)
53ErrorRefAlreadyExistserrors.lang (11 - Reference <b>%s</b> already exists.) (83 - Ref used for creation already exists.)
59NotTheAssignedApproverholiday.lang (77 - You are not the assigned approver) (101 - You are not the assigned approver)
63Language_es_GTlanguages.lang (43 - Spanish (Guatemala)) (52 - Spanish (USA))
72ReasonDeclineOrCancelpartnership.lang (55 - Decline reason) (83 - Reason for declining or canceling)
93unitGproducts.lang (207 - Gram) (215 - Gram)
94unitMproducts.lang (208 - Meter) (219 - Meter)
95unitM2products.lang (210 - Square meter) (225 - Square meter)
96unitM3products.lang (211 - Cubic meter) (231 - Cubic meter)
97ThirdPartyRequiredToGenerateInvoiceprojects.lang (244 - A third party must be defined on project to be able to invoice it.) (245 - A third party must be defined on project to be able to create intervention.)
98Receptionreceptions.lang (5 - Reception) (8 - Reception)
99Receptionsreceptions.lang (6 - Receptions) (9 - Receptions)
101ImportSitewebsite.lang (76 - Import website template) (120 - Import website)
3ByYearaccountancy.lang (220 - By year)
main.lang (823 - By year)
30Eventsagenda.lang (12 - Events)
main.lang (936 - Events)
42ShowDetailsblockedlog.lang (16 - Show stored details)
main.lang (1102 - Show details)
46Browsercashdesk.lang (93 - Browser)
main.lang (741 - Browser)
51StatusToPaycompta.lang (66 - To pay)
main.lang (443 - To pay)
61StatusInterInvoicedinterventions.lang (30 - Billed)
main.lang (533 - Invoiced)
65ConfirmCloneAskmain.lang (183 - Are you sure you want to clone the object <b>%s</b>?)
supplier_proposal.lang (38 - Are you sure you want to clone the price request <b>%s</b>?)
66ReOpenmain.lang (201 - Re-Open)
stocks.lang (253 - Reopen)
67Typemain.lang (233 - Type)
ticket.lang (75 - Type)
68MulticurrencyPaymentAmountmain.lang (383 - Payment amount, original currency)
multicurrency.lang (19 - Payment amount, original currency)
69Rejectsmain.lang (552 - Rejects)
withdrawals.lang (41 - Rejects)
6InternalUseradmin.lang (54 - Internal user)
users.lang (71 - Internal user)
7NewModuleadmin.lang (222 - New module)
modulebuilder.lang (8 - New module)
8NoticePeriodadmin.lang (285 - Notice period)
holiday.lang (113 - Notice period)
9LanguageFileadmin.lang (387 - Language file)
modulebuilder.lang (51 - File for language)
10PriceFormatInCurrentLanguageadmin.lang (429 - Price Format In Current Language)
companies.lang (30 - Price display format in the current language and currency)
11Stringadmin.lang (430 - String)
members.lang (112 - String)
12Intadmin.lang (435 - Integer)
members.lang (114 - Int)
13DateAndTimeadmin.lang (437 - Date and hour)
members.lang (115 - Date and time)
14Fieldadmin.lang (520 - Field)
blockedlog.lang (2 - Field)
exports.lang (63 - Field)
15Upgradeadmin.lang (1128 - Upgrade)
install.lang (105 - Upgrade)
16Serveradmin.lang (1139 - Server)
install.lang (50 - Server)
17DatabaseServeradmin.lang (1141 - Database host)
install.lang (53 - Database server)
18DatabaseNameadmin.lang (1142 - Database name)
install.lang (54 - Database name)
19DriverTypeadmin.lang (1150 - Driver type)
install.lang (49 - Driver type)
20CompanyNameadmin.lang (1171 - Name)
companies.lang (25 - Company name)
21WithdrawalsSetupadmin.lang (1695 - Setup of module Direct Debit payments)
withdrawals.lang (37 - Direct debit payment setup)
22Buyadmin.lang (1782 - Buy)
products.lang (56 - Purchase)
23Selladmin.lang (1783 - Sell)
products.lang (55 - Sell)
24AccountancyCodeadmin.lang (1786 - Accounting Code)
companies.lang (343 - Accounting account)
25CashDeskadmin.lang (1812 - Point of Sale)
cashdesk.lang (3 - Point of sale)
26ByDefaultInListadmin.lang (1972 - Show by default on list view)
categories.lang (94 - By default in list)
2LineIdaccountancy.lang (139 - Id line)
exports.lang (43 - Id of line)
4CustomerInvoicePaymentaccountancy.lang (237 - Payment of invoice customer)
banks.lang (103 - Customer payment)
5NotReconciledaccountancy.lang (303 - Not reconciled)
banks.lang (102 - Not reconciled)
29AffectedToagenda.lang (10 - Assigned to)
projects.lang (119 - Allocated to)
31Locationagenda.lang (16 - Location)
stocks.lang (39 - Location)
32InterventionSentByEMailagenda.lang (86 - Intervention %s sent by email)
interventions.lang (38 - Intervention %s sent by email)
34DeleteTypeassets.lang (29 - Delete)
members.lang (84 - Delete)
35ShowTypeCardassets.lang (32 - Show type '%s')
members.lang (157 - Show type '%s')
36Settings assets.lang (43 - Settings)
knowledgemanagement.lang (29 - Settings)
recruitment.lang (29 - Settings)
37IBANbanks.lang (32 - IBAN number)
bills.lang (461 - IBAN)
38BICbanks.lang (33 - BIC/SWIFT code)
bills.lang (464 - BIC/SWIFT)
39Accountbanks.lang (66 - Account)
compta.lang (15 - Account)
40SubscriptionPaymentbanks.lang (105 - Subscription payment)
members.lang (171 - Contribution payment)
41InvoiceRefbills.lang (340 - Invoice ref.)
receiptprinter.lang (67 - Invoice ref)
43NoSupplierOrderboxes.lang (80 - No recorded purchase order)
orders.lang (84 - No purchase order)
44ShowCompanycashdesk.lang (30 - Show company)
companies.lang (359 - Third Party)
45Historycashdesk.lang (71 - History)
suppliers.lang (7 - History)
47DeleteFromCatcategories.lang (85 - Remove from tags/category)
compta.lang (268 - Remove from accounting group)
48Customercommercial.lang (4 - Customer)
companies.lang (303 - Customer)
49Prospectcommercial.lang (6 - Prospect)
companies.lang (301 - Prospect)
propal.lang (12 - Prospect)
50ShowTaskcommercial.lang (18 - Show task)
projects.lang (39 - Show task)
52ContractStatusClosedcontracts.lang (9 - Closed)
products.lang (85 - Closed)
54NewSubscriptioneventorganization.lang (133 - Registration)
members.lang (71 - New contribution)
55ExportsAreaexports.lang (2 - Exports)
other.lang (277 - Exports area)
56ExportableDatasexports.lang (6 - Exportable dataset)
other.lang (281 - Exportable data)
57AvailableFormatsexports.lang (27 - Available Formats)
other.lang (278 - Available formats)
58ChooseFileToImportexports.lang (59 - Upload file then click on the %s icon to select file as source import file...)
stocks.lang (249 - Upload file then click on the %s icon to select file as source import file...)
60CreateUserinstall.lang (61 - Create user account or grant user account permission on the Dolibarr database)
users.lang (31 - Create user)
62About knowledgemanagement.lang (36 - About)
recruitment.lang (38 - About)
64Answeredmails.lang (175 - Answered)
ticket.lang (69 - Answered)
70OrderDateorders.lang (10 - Order date)
suppliers.lang (10 - Order date)
71CreatedByother.lang (117 - Created by %s)
ticket.lang (163 - Created by)
73FollowingUrlAreAvailableToMakePaymentspaybox.lang (4 - Following URLs are available to offer a page to a customer to make a payment on Dolibarr objects)
stripe.lang (5 - Following URLs are available to offer a page to a customer to make a payment on Dolibarr objects)
74PaymentFormpaybox.lang (5 - Payment form)
stripe.lang (6 - Payment form)
75WelcomeOnPaymentPagepaybox.lang (6 - Welcome to our online payment service)
stripe.lang (7 - Welcome to our online payment service)
76ThisScreenAllowsYouToPaypaybox.lang (7 - This screen allow you to make an online payment to %s.)
stripe.lang (8 - This screen allow you to make an online payment to %s.)
77ThisIsInformationOnPaymentpaybox.lang (8 - This is information on payment to do)
stripe.lang (9 - This is information on payment to do)
78ToCompletepaybox.lang (9 - To complete)
stripe.lang (10 - To complete)
79YourEMailpaybox.lang (10 - Email to receive payment confirmation)
stripe.lang (11 - Email to receive payment confirmation)
80Creditorpaybox.lang (11 - Creditor)
stripe.lang (13 - Creditor)
81PaymentCodepaybox.lang (12 - Payment code)
stripe.lang (14 - Payment code)
82Continuepaybox.lang (15 - Next)
stripe.lang (17 - Next)
83AccountParameterpaybox.lang (19 - Account parameters)
stripe.lang (27 - Account parameters)
84UsageParameterpaybox.lang (20 - Usage parameters)
stripe.lang (28 - Usage parameters)
85InformationToFindParameterspaybox.lang (21 - Help to find your %s account information)
stripe.lang (29 - Help to find your %s account information)
86CSSUrlForPaymentFormpaybox.lang (23 - CSS style sheet url for payment form)
stripe.lang (31 - CSS style sheet url for payment form)
87Stockproducts.lang (51 - Stock)
stocks.lang (18 - Stock)
88Stocksproducts.lang (53 - Stocks and location (warehouse) of products)
stocks.lang (19 - Stocks)
89Movementsproducts.lang (54 - Movements)
stocks.lang (27 - Movements)
90Suppliersproducts.lang (90 - Vendors)
suppliers.lang (2 - Vendors)
91ListOfStockMovementsproducts.lang (97 - List of stock movements)
stocks.lang (30 - List of stock movements)
92Unitproducts.lang (181 - Unit)
stocks.lang (46 - Unit)
100NewUserticket.lang (290 - New user)
users.lang (30 - New user)